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Preprint REVIEW | doi:10.20944/preprints202208.0121.v1

Influence of ZnO Nanostructure Morphologies on Perovskite Solar Cell Performance: A Review

Matshidiso Manabeng, Benard Mwankemwa, Richard Ocaya, Tshwafo Elias Motaung, Thembinkosi Malevu

Subject: Materials Science, General Materials Science Keywords: ZnO morphologies; Perovskite; Efficiency; photovoltaic devices

Online: 5 August 2022 (09:53:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201801.0036.v13

Atomic Structure and Binding of Carbon Atoms

Mubarak Ali

Subject: Materials Science, General Materials Science Keywords: Carbon; Atomic structure; Electron dynamics; Potential energy; Binding

Online: 29 July 2022 (02:57:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0431.v1

Terahertz Resonators based on Y-Ba-Cu-O High-Tc Superconductor

Salvatore Macis, Maria Chiara Paolozzi, Annalisa D'Arco, Luca Tomarchio, Alessandra Di Gaspare, Stefano Lupi

Subject: Materials Science, General Materials Science Keywords: split ring resonator; superconductor; modulation; THz

Online: 28 July 2022 (07:28:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201701.0028.v13

Heat and Photon Energy Phenomena: Dealing with Matter at Atomic and Electronic Level

Mubarak Ali

Subject: Materials Science, General Materials Science Keywords: Heat energy; Photon energy; Fundamental forces; Electron dynamics; Atomic-scale phenomenon; Photon-matter interaction

Online: 27 July 2022 (05:30:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0278.v1

Biodiesel Synthesis from Milk Thistle Extract of Silybum marianum (L.) Gaertn. using ZnO Nanoparticles as A Catalyst

Hammad Ahmad Jan, Igor Šurina, Ahmed Al-Fatesh, Abdulaziz M. Almutlaq, Sher Wali

Subject: Materials Science, General Materials Science Keywords: biodiesel synthesis; nanoparticle synthesis; green catalyst synthesis; physicochemical analysis; Silybum marianum; nonedible feedstock

Online: 19 July 2022 (05:53:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0252.v1

Fractal Research for the Production of High-Strength Materials

Eunsung Jekal, Seoryeong Choi

Subject: Materials Science, General Materials Science Keywords: fractal; SiC

Online: 18 July 2022 (08:15:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0129.v1

Spectroscopic and Voltammetric Study of Recycled and Cooper-Manganese-Doped Electrode Materials

S. Rada, Mihaela Unguresan, J Zhang, E Culea

Subject: Materials Science, General Materials Science Keywords: recycled electrode; spent battery; spectroscopic method; cyclic voltammetry

Online: 8 July 2022 (03:31:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0123.v1

Discontinuity in the Electronic Structure and Magnetic Order of β-Co_1+xGa₁-_x

Gerhard H. Fecher

Subject: Materials Science, General Materials Science Keywords: CoGa; electronic structure; magnetism; binary alloys

Online: 7 July 2022 (09:44:18 CEST)

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Preprint REVIEW | doi:10.20944/preprints202207.0091.v1

Chirality in the Solid State: Chiral Crystal Structures in Chiral and Achiral Space Groups

Gerhard H. Fecher, Jürgen Kübler, Claudia Felser

Subject: Materials Science, General Materials Science Keywords: Chiral Materials; Chiral Space Groups; Chirality; Chirality measure; Electronic structure; Circular Dichroism

Online: 6 July 2022 (08:55:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0373.v1

Anisotropy of the E Effect in Ni-based Magnetoelectric Cantilevers: A Finite Element Method Analysis

Bernd Hähnlein, Neha Sagar, Hauke Honig, Stefan Krischok, Katja Tonisch

Subject: Materials Science, General Materials Science Keywords: delta E effect; magnetoelectric sensor; Nickel; anisotropy

Online: 27 May 2022 (09:04:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0347.v1

Property Variation of Extruded Mg-Gd Alloys by Mn Addition and Processing

Björn Wiese, Jochen Harmuth, Regine Willumeit-Römer, Jan Bohlen

Subject: Materials Science, General Materials Science Keywords: Mg alloy; extrusion; rare earth elements; thermomechanical; processing; texture; degradable

Online: 25 May 2022 (10:05:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0039.v1

Structural and Optical Characterization of Mechanochemically Synthesized CuSbS2 Compounds

Luís Esperto, Isabel Figueira, João Mascarenhas, Teresa Pena Silva, José Brito Correia, Filipe Neves

Subject: Materials Science, General Materials Science Keywords: powder technology; mechanochemical synthesis; absorber materials; chalcostibite

Online: 5 May 2022 (12:36:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201701.0028.v12

Heat and Photon Energy Phenomena: Dealing with Matter at Atomic and Electronic Level

Mubarak Ali

Subject: Materials Science, General Materials Science Keywords: heat energy; photon energy; fundamental forces; electron dynamics; atomic-scale phenomenon; photon-matter interaction

Online: 25 April 2022 (05:40:32 CEST)

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Misconception in using the terms photon and electron exists in science. When the electron of the outer ring in the silicon atom executes interstate dynamics for only one cycle, it generates force and energy for the unit photon. Interstate electron dynamics for one forward and reverse cycle generate the overt photon having the least measured length. When the photon of suitable length interacts with the side of the laterally orientated electron of an atom, it converts into heat energy. Under the approximate angle of 90º, when a photon interacts with the tip of a laterally orientated electron, it divides into bits of energy having a shape like integral symbols. In the neutral state silicon atom, the centre acts as the reference point for electrons executing interstate dynamics, and the lateral lengths of the electrons remain along the north-south poles. Under the availability of energy and force, the energy wraps around the force shaping along the tracing trajectory of electron dynamics in a silicon atom. A shaping force due to two poles is from those sides of the electron, not dealing with the force of the remaining two poles. In interstate dynamics, the electron of the outer ring first reaches the maximum limit point, where the energy of one bit is shaped. Electron completes the second half cycle dealing with relevant forces from the maximum limit point, where the energy of one bit is shaped. The shape of the unit photon is like Gaussian distribution having turned ends. When there is an uninterrupted supply of heat energy to the silicon atom, electron dynamics generate the photon having a shape-like wave. Path independent but interstate dependent forces take over the control of an electron. That electron executes dynamics nearly at the speed of light. In confined interstate dynamics, naturally viable conservative forces exert on the position-acquiring electron. A photon can be in the unending length if the electron dynamics remain uninterrupted. Having not made contact with states limiting the forces at work, the changing aspect of the electron recalls the auxiliary moment of inertia at each point of turning. By executing electron dynamics, atoms under neutral states generate photons of different shapes, revealing heat and photon energy phenomena.

Preprint ARTICLE | doi:10.20944/preprints202204.0064.v1

First-Principles Study of the Electronic Structure of LLM-105 Crystal and (101) Plane Under High Pressure

Gang He, Wen Kun Zhu, Zhi Qiang Qiao, Zheng Guo Chen, Jun Wen

Subject: Materials Science, General Materials Science Keywords: low-Miller-index; High pressure; (101) plane; DFT calculation; LLM-105

Online: 7 April 2022 (14:27:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0043.v1

XPS Study Calcining Mixtures of Brucite with Titania

Karla Sofía Sánchez-Zambrano, Marina Hernández-Reséndiz, Cristian Gómez-Rodríguez, Linda Viviana García Quiñonez, Josué Almicar Aguilar-Martínez, Eden Amaral Rodríguez-Castellanos, Luis Felipe Verdeja, Daniel Fernández-González, Guadalupe Alan Castillo-Rodríguez

Subject: Materials Science, General Materials Science Keywords: brucite; magnesia; titania; Mg(OH)2; MgO; TiO2; XPS; DRX; refractories; ceramics

Online: 6 April 2022 (10:49:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0357.v1

Negative Electrical Conductivity Metamaterials

Edward Bormashenko

Subject: Materials Science, General Materials Science Keywords: metamaterial; negative electrical conductivity; negative mass; Drude-Lorentz model; negative refraction

Online: 28 March 2022 (08:56:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0276.v1

2D Hexagonal Boron Nitride for Solar Energy Conversions

Amall Ramanathan

Subject: Materials Science, General Materials Science Keywords: DFT_PAW; DUV; dynamic electrical conductivity; dielectric function; optical constants

Online: 21 March 2022 (08:19:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202203.0275.v1

Study on CerAMfacturing of Novel Alumina Aerospike Nozzles by Lithography-based Ceramic Vat Photopolymerization (CerAM VPP)

Eric Schwarzer-Fischer, Jan Sieder-Katzmann, Johannes Abel, Martin Propst, Christian Bach, Uwe Scheithauer, Alexander Michaelis

Subject: Materials Science, General Materials Science Keywords: alumina; Additive Manufacturing (AM); CerAMfacturing; vat photopolymerization (VPP); digi-tal light processing (DLP); Lithography-based Ceramic Manufacturing (LCM); cold-gas nozzle; aerospike nozzle

Online: 21 March 2022 (07:31:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202203.0167.v2

Microstructural Parameters for Modelling of Superconducting Foams

Michael Rudolf Koblischka, Anjela Koblischka-Veneva, Quentin Nouailhetas, Ghazi Hajiri, Kévin Berger, Bruno Douine, Denis Gokhfeld

Subject: Materials Science, General Materials Science Keywords: Superconducting foams; YBCO; microstructure; modelling parameters; foam cells; current flow

Online: 16 March 2022 (14:15:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints202203.0209.v1

The Effect of the Type of Activator Anion on the Hydration of Ground Granulated Blast Furnace Slag

Łukasz Gołek, Wojciech Szudek, Michał Malik

Subject: Materials Science, General Materials Science Keywords: alkali activation; anions; alkali activated materials; blast furnace slag

Online: 15 March 2022 (11:20:53 CET)

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Preprint ARTICLE | doi:10.20944/preprints202203.0167.v1

Microstructural Parameters for Modelling of Superconducting Foams

Michael Rudolf Koblischka, Anjela Koblischka-Veneva, Quentin Nouailhetas, Ghazi Hajiri, Kévin Berger, Bruno Douine, Denis Gokhfeld

Subject: Materials Science, General Materials Science Keywords: Superconducting foams; YBCO; microstructure; modelling parameters; foam cells; current flow

Online: 11 March 2022 (10:12:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202202.0019.v1

Application of Granular Biocomposites Based on Homogenised Peat for Absorption of Oil Products

Kristine Irtiseva, Marika Mosina, Anastasija Tumilovica, Vjaceslavs Lapkovskis, Viktors Mironovs, Jurijs Ozolins, Valentina Stepanova, Andrei Shishkin

Subject: Materials Science, General Materials Science Keywords: sorption; kinetics; peat; cenosphere; oil sorption; Weber-Morris; diffusion model; granules; bio-composite

Online: 1 February 2022 (17:09:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0458.v1

Preparation of Bioglasses Developed from Bypass Cement Dust for Bone Regeneration and Comparing their Radiation Damage Prediction with Natural Bone

Aiyeshah Alhodaib, Suzy Abd El All, Omnia Ibrahim, Fatthy Ezzeldin

Subject: Materials Science, General Materials Science Keywords: bypass cement dust; bioglass; FTIR; atomic displacement; radiation damage

Online: 31 January 2022 (12:50:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0432.v1

Interband Transitions And Critical Points Of Single Crystal Thoria Compared To Urania

Christina Dugan, Lu Wang, Zhang Zhang, J. Matthew Mann, Martin Kimani, Wai-Ning Mei, Peter A. Dowben, James Petrosky

Subject: Materials Science, General Materials Science Keywords: cathode luminescence; urania; thoria; interband transitions

Online: 28 January 2022 (11:11:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0404.v1

Relation between the Fatigue and Fracture Ductile-Brittle Transition in S500 Welded Steel Joints

Finn Sallaba, Franziska Rolof, Sören Ehlers, Carey Leroy Walters, Moritz Braun

Subject: Materials Science, General Materials Science Keywords: Arctic conditions; Weldment fatigue; Temperature dependence of material fatigue; Fatigue and fracture mechanics testing at low temperatures; Fatigue and fracture transitions temperatures; Direct-current potential drop method; Scanning electron microscopy; FTT; FDBT; DBTT

Online: 26 January 2022 (18:42:43 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints202201.0389.v1

Preparation of NbAs Single Crystal by the Seed Growth Process

Yinchang Sun, Bojin Zhao, Zongju Huo, Hongjun Liu, Zhanggui Hu, Hailong Qiu

Subject: Materials Science, General Materials Science Keywords: Weyl semimetal; NbAs single crystal; CVT; seed growth process

Online: 25 January 2022 (17:21:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0356.v1

Bimetallic Copper-Silver Systems Supported on Natural Clinoptilolite: Long-Term Changes in Nanospecies Composition and Stability

Inocente Rodríguez-Iznaga, Vitalii Petranovskii, Fernando Chávez-Rivas, Marina G. Shelyapina

Subject: Materials Science, General Materials Science Keywords: Clinoptilolite zeolite; Nanospecies; Bimetallic system; Copper; Silver

Online: 24 January 2022 (12:58:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0335.v1

Tuning of Magnetoimpedance Effect and Magnetic Properties of Fe-rich Glass-coated Microwires by Joule Heating.

Alvaro Gonzalez, Valentina Zhukova, Paula Corte-Leon, Alexandr Chizhik, Mihail Ipatov, Juan Maria Blanco, Arcady Zhukov

Subject: Materials Science, General Materials Science Keywords: Magnetic microwires; Magnetic anisotropy; Joule heating, Giant magnetoimpedance, Domain wall propagation, Hysteresis loop.

Online: 24 January 2022 (07:30:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202110.0240.v2

Graphene Prepared via the Dry Ice in Flames Method and its Purification Using Different Routes: A Comparative Study

Eduardo Cuadros-Lugo, Harby A. Martinez-Rodríguez, Daniel Lardizabal-Gutiérrez, Ivanovich Estrada-Guel, Jose M. Herrera-Ramirez, Caleb Carreño-Gallardo

Subject: Materials Science, General Materials Science Keywords: graphene; dry ice; mechanical milling; magnesium oxide

Online: 13 January 2022 (13:44:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0088.v1

Numerical Approach in Superconductivity: An Advanced Study

Valeriy Kizka

Subject: Materials Science, General Materials Science Keywords: High-temperature superconductivity; critical temperature

Online: 6 January 2022 (12:36:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0477.v1

Morphology and Performance Characterizations of 316 Stainless Steel Additively Fabricated by Laser Thermal-Joule Heating Composite Process

Suli Li, Kaijue Ma, Xu Chao, Yang Gao, Laixia Yang, Bingheng Lu

Subject: Materials Science, General Materials Science Keywords: Laser power; Joule heat; Composite heat source; Temperature field; Additive manufacturing

Online: 30 December 2021 (07:16:03 CET)

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Preprint REVIEW | doi:10.20944/preprints202112.0438.v1

X-Ray Diffraction Techniques for Mineral Characterization: A Review for Engineers of the Fundamentals, Applications, and Research Directions

Asif Ali, Yi Wai Chiang, Rafael M. Santos

Subject: Materials Science, General Materials Science Keywords: X-ray diffraction; Mineral characterization; Crystal structure; Bragg’s law; Lattice parameters; Crystallography; Unit cell

Online: 27 December 2021 (15:53:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0182.v1

Superionic Solid Electrolyte Li₇La₃Zr₂O₁₂ Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries

Anatoliy Popovich, Pavel Novikov, Qingsheng Wang, Daniil Aleksandrov

Subject: Materials Science, General Materials Science Keywords: lithium-ion battery; solid-state electrolyte; lithium-ion thermodynamics; solid-state synthesis

Online: 10 December 2021 (13:20:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0356.v1

High-Resolution Microstructure Characterization of Additively Manufactured X5CrNiCuNb17-4 Maraging Steel during Ex and in Situ Thermal Treatment

Mihaela Albu, Bernd Panzirsch, Hartmuth Schröttner, Stefan Mitsche, Klaus Reichmann, Cecilia Poletti, Gerald Kothleitner

Subject: Materials Science, General Materials Science Keywords: additive manufacturing; microstructure; STEM in situ heating experiments

Online: 19 November 2021 (14:23:25 CET)

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Preprint REVIEW | doi:10.20944/preprints202111.0271.v1

Review On Progress of 7xxx Series Aluminum Alloy Materials

Yuxin Dai, Liangming Yan, Jianpeng Hao

Subject: Materials Science, General Materials Science Keywords: 7xxx superhard aluminum; Heat treatment technological; Alloy microstructure; Future direction

Online: 15 November 2021 (19:14:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0234.v1

On the Arrangement of Pentagonal Columns in Tetragonal Tungsten Bronze-Type Nb18W16O93

Frank Krumeich

Subject: Materials Science, General Materials Science Keywords: niobium tungsten oxide; pentagonal tunnels; tetragonal tungsten bronze; high-angle annular dark field detector; scanning transmission electron microscopy; HAADF-STEM; twinning; superstructure, battery material.

Online: 12 November 2021 (15:17:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0218.v1

Laves Phase Formation in High Entropy Alloys

Roman Ryltsev, Svetlana Estemirova, Evgenii Sterkhov, Lubov Cherepanova, Denis Yagodin, Nikolay Chtchelkatchev, Nikolay Dubinin, Sergey Uporov

Subject: Materials Science, General Materials Science Keywords: high-entropy alloy; Laves phase; microstructure; electrical conductivity; magnetization; density of states; ab initio calculations

Online: 12 November 2021 (11:59:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0002.v1

Anisotropic Optical And Vibrational Properties Of GeS

Natalia Zawadzka, Łucja Kipczak, Tomasz Woźniak, Katarzyna Olkowska-Pucko, Magdalena Grzeszczyk, Adam Babiński, Maciej R. Molas

Subject: Materials Science, General Materials Science Keywords: monochalcogenides; germanium sulfide; photoluminescence; reflectance contrast; excitons; Raman scattering; Density Fuctional Theory; phonons

Online: 1 November 2021 (10:18:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints202110.0425.v1

Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Rosa Bustamante, Patricia Vázquez, Nicanor Prendes

Subject: Materials Science, General Materials Science Keywords: ignimbrite pe; petrography; physico-mechanical properties; color; cultural heritage

Online: 28 October 2021 (07:39:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0361.v1

The Use of Geotechnical Methods to Determine the Strength Parameters of the Substrate in Terms of Operation and Safety of Mortar Use

Grzegorz Bartnik, Kazimierz Józefiak, Małgorzata Superczyńska, Magdalena Czerwińska, Witold Krajewski, Józef Legieć, Tadeusz Kuśnierz, Mariusz Magier

Subject: Materials Science, General Materials Science Keywords: mortar; strength properties; operational safety; organic soils; weak soils; deformation modulus; dynamic deformations

Online: 25 October 2021 (15:33:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0174.v1

Bragg Mirrors for Thermal Waves

Angela Camacho de la Rosa, David Becerril, Guadalupe Gómez-Farfán, Raul P Esquivel-Sirvent

Subject: Materials Science, General Materials Science Keywords: Cattaneo-Vernotte; waves; Bragg

Online: 12 October 2021 (10:21:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0053.v1

Synthesis Method and Thermodynamic Characteristics of Anode Material Li3FeN2 for Application in Lithium-Ion Batteries

Anatoliy Popovich, Pavel Novikov, Daniil Aleksandrov, Konstantin Pushnitsa, Qingsheng Wang

Subject: Materials Science, General Materials Science Keywords: lithium-ion battery; anode battery; lithium-ion thermodynamics; solid-state synthesis

Online: 4 October 2021 (11:54:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0189.v1

The Mechanism of Joint Reduction of MoO3 and CuO by Combined Mg/C Reducer at High Heating Rates

Hasmik Kirakosyan, Khachik Nazaretyan, Sofiya Aydinyan, Suren Kharatyan

Subject: Materials Science, General Materials Science Keywords: Joint reduction of oxides; high heating rate; Mg/C combined reducer; dysynergistic effect; activation energy

Online: 9 August 2021 (10:19:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0119.v1

Copper, Iron, and Aluminium Electrochemical Corrosion Rates and Intrinsic Diffusivitives Dependence on Temperature Investigations

Mykhaylo Viktorovych Yarmolenko

Subject: Materials Science, General Materials Science Keywords: Keywords: electrochemical corrosion, metallic coatings, electrolysis, diffusion, intermetallic compounds, phases formation kinetics, copper, aluminium, iron, Kirkendall-Frenkel porosity, Kirkendall sh

Online: 5 July 2021 (16:24:31 CEST)

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Our investigations show that electrochemical corrosion of copper is faster than electrochemical corrosion of aluminium at temperatures below 100oC. Literature data analysis shows that the Al atoms diffuse faster than the Cu atoms at temperatures higher than 475oC, Al rich intermetallic compounds (IMCs) are formed faster in the Cu-Al system, and the Kirkendall plane shifts toward Al side. Electrochemical corrosion occurs due to electric current and due to diffusion. An electronic devise working time, for example, depends on initial copper cover thickness on aluminium wire, connected to the electronic devise, temperature, and volume and dislocation pipe diffusion coefficients, so copper, iron, and aluminium electrochemical corrosion rates are investigated experimentally at room temperature and at temperature 100oC. Intrinsic diffusivities ratios of copper and aluminium at different temperatures and diffusion activation energies in the Cu-Al system are calculated by proposed here methods using literature experimental data. Dislocation pipe and volume diffusion activation energies of pure iron are calculated separately by earlier proposed method using literature experimental data. Aluminium dissolved into NaCl solution as the Al3+ ions at room temperature and at temperature 100oC, iron dissolved into NaCl solution as the Fe2+ (not Fe3+) ions at room temperature and at temperature 100oC, copper dissolved into NaCl solution as the Cu+ ions at room temperature and as the Cu+ and the Cu2+ ions at temperature 100oC. It is founded experimentally that copper corrosion is higher than aluminium corrosion, and ratio of electrochemical corrosion rates, kCu/kAl>1, decreases with temperature increasing, although iron electrochemical corrosion rate doesn’t depend on temperature below 100oC. It is obvious, because melting point of iron is more higher then melting point of copper or aluminium. It is calculated that copper electrochemical corrosion rate is approximately equal to aluminium electrochemical corrosion at temperature about 300oC, so copper can dissolve into NaCl solution mostly as the Cu2+ ions at temperature about 300oC. Ratio of intrinsic diffusivities, DCu/DAl <1, increases with temperature increasing, and intrinsic diffusivity of aluminium could be approximately equal to intrinsic diffusivity of copper at temperature about 460oC.

Preprint COMMUNICATION | doi:10.20944/preprints202106.0394.v1

X-ray Diffraction of Alkali-Activated Materials with CBPD

Barbara Vojvodikova, Lukas Prochazka, Jana Bohacova

Subject: Materials Science, General Materials Science Keywords: Cement By-Pass Dust; Blast Furnace Granulated Slag; Silica Fly Ash; Alkali-Activated Materials.

Online: 15 June 2021 (10:59:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0005.v1

Insight in the crystallization kinetics of AlPO4-11 molecular sieve using di-isopropylamine as template

Renilson O. Mapele, Antonio O. S. Silva, Marcelo J. B. Souza, Anne M.G. Pedrosa, Ana C. F. Coriolano, Glauber JT Fernandes, Valter J. Fernandes, Antonio S. Araujo

Subject: Materials Science, General Materials Science Keywords: Hydrothermal synthesis; Microporous materials; Aluminophosphate; Crystallization kinetics

Online: 1 June 2021 (09:22:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0405.v1

Applying Mixture of Municipal Incinerator Bottom Ash and Sewage Sludge Ash for Ceramic Manufacturing

Deng-Fong Lin, Wei-Jhu Wang, Chia-Wen Chen, Kuo-Liang Lin

Subject: Materials Science, General Materials Science Keywords: municipal incinerator bottom ash, sewage sludge ash, SEM, NMR,

Online: 18 May 2021 (10:02:57 CEST)

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Preprint REVIEW | doi:10.20944/preprints202104.0782.v2

A Review of Electrospun Carbon Nanofiber-Based Negative Electrode Materials for Supercapacitors

Arjun Prasad Tiwari, Tanka Mukhiya, Alagan Muthurasu, Kisan Chhetri, Minju Lee, Bipeen Dahal, Prakash Chandra Lohani, Hak Yong Kim

Subject: Materials Science, General Materials Science Keywords: electrospinning; negative electrode materials; carbon nanofibers; free-standing; supercapacitor

Online: 10 May 2021 (09:34:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201701.0028.v11

Heat and Photon Energy Phenomena: Dealing with Matter at Atomic and Electronic Level

Mubarak Ali

Subject: Materials Science, General Materials Science Keywords: Heat energy; Photons; Fundamental forces; Electron dynamics; Atomic scale phenomenon; Electronic scale phenomenon

Online: 19 January 2021 (10:57:31 CET)

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Misconception in using terms photon and electron exists in science. When the electron of outer ring in silicon atom executes interstate dynamics for only one cycle, it generates force and energy for the unit photon. Interstate dynamics of the electron for one forward and reverse cycle generate the overt photon having the least measured length. When the photon of suitable length interacts with the side of laterally orientated electron of an atom, it converts into the heat energy. Under the approximate angle of 90º, when a photon interacts with the tip of laterally orientated electron, it divides into the bits of energy having a shape like integral symbols. In the neutral state silicon atom, the centre acts as the reference point for electrons executing interstate dynamics and the lateral lengths of the electrons remains along the north-south poles. Under the availability of energy and force, the energy wraps around the force shaping along the tracing trajectory of electron dynamics in a silicon atom. A force is being shaped from the sides of electron not experiencing the exertions of forces. In interstate dynamics, electron of the outer ring first reaches the ‘maximum limit point’, where energy of one bit is utilized wrapping around the shaping force along its tracing trajectory. From the ‘maximum limit point’, electron completes the second half cycle dealing with relevant forces, where again energy of one bit is wrapped around the shaping force along the tracing trajectory. The shape of unit photon is like ‘Gaussian distribution of turned ends’. Under the uninterrupted heat energy for the silicon atom, an electron dynamics generates the photon having a shape like wave. Path independent but interstate dependent forces take over the control of electron. That electron executes dynamics nearly in the speed of light. In confined interstate dynamics, naturally viable conservative forces exert to the position-acquiring electron. A photon can be in the continuous and unending length if the electron dynamics remains uninterrupted. Having not made contact with states limiting the forces at work, the changing aspect of electron recalls auxiliary moment of inertia at each point of turning. By executing electron dynamics, atoms under neutral states generate photons of different shapes, so revealing the phenomena of heat and photon energy.

Preprint ARTICLE | doi:10.20944/preprints202101.0241.v1

Determination of Material Properties of Basketball. Finite Element Modeling of the Basketball Bounce Height

Andrzej Makowski

Subject: Materials Science, General Materials Science Keywords: hyperelastic materials; FEM; basketball; sports floors; Ogden model; FIBA

Online: 13 January 2021 (11:36:53 CET)

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Preprint ARTICLE | doi:10.20944/preprints202012.0181.v1

Metamaterials Demonstrating Negative Thermal Capacity

Edward Bormashenko, Evgeny Shulzinger

Subject: Materials Science, General Materials Science Keywords: metamaterials; negative effective mass; negative density; negative thermal capacity; resonance.

Online: 8 December 2020 (07:02:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202010.0026.v1

Insight on TiO2-ZnO Photocomposite Competence Fabricated via Sonication Assisted with Gelatin for Rhodamine B Degradation

Arafat Toghan, Kamal K. Taha, A. Modwi

Subject: Materials Science, General Materials Science Keywords: TiO2-ZnO photocatalysts; gelatin; William-Hall plots; Rhodamine B degradation

Online: 1 October 2020 (17:03:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0519.v1

Raw Materials Based on Fly Ash of Eggs Shell and Algerian Sand Dune (Southern of Algeria) for Synthesis of Environmentally Cementitious Materials: Synthesis and Characterization

Abdelghani Brahimi, Mourad Meghachou, Hicham Abbed, Abdelkader Rahmouni, fFtima Zohra Zeggai, Bachari Khaldoun, Mohammed Belbachir

Subject: Materials Science, General Materials Science Keywords: fly ash; Geopolymer; silicon dioxid; sodium silicate; sand dune; egg Shell

Online: 22 September 2020 (10:25:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0503.v1

Tribological Behaviour of K340 Steel PVD Coated with CrAlSiN Versus Popular Tool Steel Grades

Kazimierz Drozd, Mariusz Walczak, Mirosław Szala, Kamil Gancarczyk

Subject: Materials Science, General Materials Science Keywords: cold/hot-work steel; sliding; friction; wear testing; XRD analysis; wear mechanism; hardness; heat treatment; thin film; abrasion

Online: 21 September 2020 (12:02:17 CEST)

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The tribological performance of metalwork steel tools is of vital importance in both cold and hot working processes. One solution for improving metal tool life is the application of coatings. This paper investigates the effect of CrAlSiN thin-film PVD-deposition on the tribological behaviour of tool steel K340. The sliding wear performance of the coated K340 steel is analysed in relation to both the uncoated K340 steel and a range of tool steels dedicated to hot- and cold-working, such as X155CrVMo12-1, X37CrMoV5-1, X40CrMoV5-1, 40CrMnMo7 and 90MnCrV8. The investigated tool steels were heat-treated, while K340 was subjected to thermochemical treatment and then coated with a CrAlSiN hard film (K340/CrAlSiN). The hardness, chemical composition, phase structure and microstructure of steels K340 and K340/CrAlSiN are examined. Tribological tests were conducted using the ball-on-disc tester in compliance with the ASTM G99 standard. The tests were performed under dry unidirectional sliding conditions, using an Al2O3 ball as a counterbody. The wear factor and coefficient of friction are estimated and analysed with respect to hardness and alloying composition of the materials under study. SEM observations are made to identify the sliding wear mechanisms of the analysed tool steels and PVD-coated K340 steel. In contrast to the harsh abrasive-adhesive wear mechanism observed for uncoated tool steels, the abrasive wear dominates in case of the AlCrSiN. The deposited thin film effectively prevents the K304 substrate from harsh wear severe degradation. Moreover, thanks to the deposited coating, the K304/CrAlSiN sample has a COF of 0.529 and a wear factor of K=5.68×10−7 m3 N−1 m−1, while the COF of the reference tool steels ranges from 0.702 to 0.885 and their wear factor ranges from 1.68×10−5 m3 N−1 m−1 to 3.67×10−5 m3 N−1 m−1. The CrAlSiN deposition reduces the wear of the K340 steel and improves its sliding properties, which makes it a promising method for prolonging the service life of metalwork tools.

Working Paper ARTICLE

A Comparison between Semisolid Casting Methods for Aluminium Alloys

Anders E. W. Jarfors

Subject: Materials Science, General Materials Science Keywords: Semisolid casting; RheoMetal process; GISS process; SEED process; production; capability; surface treatment; heat treatment; tool-life; productivity

Online: 19 September 2020 (05:15:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0143.v1

Determination of Composite Properties in the Presence of Fiber Deboning and Matrix Damage by Using the Method of Cell

Mohammad Ghalandari, Hossein Toozandehjani, Ibrahim Mahariq, Thabet Abeljawad

Subject: Materials Science, General Materials Science Keywords: Composite; Micromechanics; Cell Method; Failure; Isolation

Online: 6 September 2020 (15:38:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0126.v1

Transformation Kinetics of Burnt Lime in Freshwater and Sea Water

Harald Justnes, Carlos Escudero-Oñate, Øyvind Aaberg Garmo, Martin Mengede

Subject: Materials Science, General Materials Science Keywords: calcium oxide; calcium hydroxide; kinetics; lime; magnesium hydroxide; sea water

Online: 5 September 2020 (07:49:12 CEST)

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Working Paper ARTICLE

Eco-Friendly Betanin Hybrid Materials Based on Palygorskite and Halloysite

Shue Li, Bin Mu, Xiaowen Wang, Yuru Kang, Aiqin Wang

Subject: Materials Science, General Materials Science Keywords: Palygorskite; Halloysite; Betanin; Hybrid materials; Stability

Online: 4 September 2020 (04:36:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0065.v1

Synthesis and Characterization of Co²⁺ Ions Doped ZnS-CdS Composite Nanopowder

Madhavi Jonnalagadda

Subject: Materials Science, General Materials Science Keywords: Semiconductors; X-ray diffraction; Composite nanopowder; SEM; Optical properties; VSM

Online: 3 September 2020 (08:18:50 CEST)

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Working Paper ARTICLE

Fabrication of Eco-Friendly Superabsorbent Composites based on Waste Semicoke

Yongsheng Wang, Yongfeng Zhu, Yan Liu, Aiqin Wang

Subject: Materials Science, General Materials Science Keywords: superabsorbent composites; semicoke; water absorbency

Online: 3 September 2020 (03:46:37 CEST)

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Working Paper ARTICLE

Effects of Molority on Bond Strength of Brick Masonry with Alkali Activated Composite Mud Mortar - Modelling by Ansys

Palanisamy Periasamy, Kumar P.S.

Subject: Materials Science, General Materials Science Keywords: Alkali Activated Composite Mud Mortar; Alternate to Cement Mortar; Numerical Analysis; ANSYS; Bond strength; Shear crack behaviour

Online: 31 August 2020 (05:05:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0681.v1

QUMEC: Software for Quantum Mechanics First Principle Calculation in 3-Dimensional Real Space

Hamed Hosseinzadeh

Subject: Materials Science, General Materials Science Keywords: Quantum mechanics; DFT; Pseudopotential; Total energy calculation; Software

Online: 30 August 2020 (17:37:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0567.v1

Li2CaGeO4 – Wide Band Gap Semiconductor: First Principles Investigation of the Structural, Electronic, Optical and Elastic Properties

Saadi Berri

Subject: Materials Science, General Materials Science Keywords: Wide band gap semiconductor; Elastic modulus; Optic-electronic properties; Ab–initio calculations

Online: 26 August 2020 (08:57:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0264.v1

Basal Plane Bending of Homoepitaxial MPCVD Single-crystal Diamond

Xiaotong Han, Peng Duan, Yan Peng, Xuejian Xie, Xiwei Wang, Jinying Yu, Xiufei Hu, Dufu Wang, Xiaobo Hu, Xiangang Xu

Subject: Materials Science, General Materials Science Keywords: basal plane bending; homoepitaxial single-crystal diamond (SCD); high-resolution x-ray diffraction; growth temperature

Online: 11 August 2020 (10:14:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0247.v1

Thermal Conductivity of the Ga-In System: Experimental Measurements and CALPHAD Modeling

Parker Maivald, Soumya Sridar, Wei Xiong

Subject: Materials Science, General Materials Science Keywords: Ga-In; thermal conductivity; CALPHAD; comparative cut bar method; thermal interface material

Online: 11 August 2020 (03:12:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0153.v1

Determination of Formation Energies and Phase Diagrams of Transition Metal Oxides with DFT+U

Daniel Mutter, Daniel F. Urban, Christian Elsässer

Subject: Materials Science, General Materials Science Keywords: transition metal oxides; density functional theory; DFT+U; materials modelling; phase diagrams

Online: 6 August 2020 (10:32:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0098.v2

On the Construction of Raindrop Erosion Maps for Steel

James Sloan, Margaret Stack

Subject: Materials Science, General Materials Science Keywords: Raindrop erosion; Steel; Maps

Online: 5 August 2020 (10:36:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0098.v1

On the Construction of Raindrop Erosion Maps for Steel

James Sloan, Margaret M. Stack

Subject: Materials Science, General Materials Science Keywords: Raindrop erosion; Steel; Maps

Online: 4 August 2020 (15:56:32 CEST)

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Working Paper ARTICLE

Hot Deformation Behavior of Cu-Sn-La Polycrystalline Alloy Prepared by Upcasting

Siming Hua, Pingze Zhang, Zili Liu, Lin Yang

Subject: Materials Science, General Materials Science Keywords: Cu-Sn-La alloy; stress-strain; hot deformation; constitutive equations; dynamic recrystallization

Online: 2 August 2020 (17:53:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0037.v1

Effect of pH on the Formation of Amorphous TiO₂ Complexes and TiO₂ Anatase during Pyrolysis of TiCl₄ Aqueous Solution

Mai Xuan Dung, Tuan Mai Van, Huyen Duong Ngoc

Subject: Materials Science, General Materials Science Keywords: photocatalyst; amorphous TiO2 complexes; TiO2; anatase nanostructure

Online: 2 August 2020 (15:11:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0019.v1

Mechanical and Thermal Analyses of Metal-PLA Components Fabricated by Metal Material Extrusion

Mahdi Mohammadizadeh, Hao Lu, Ismail Fidan, Khalid Tantawi, Ankit Gupta, Seymur Hasanov, Zhicheng Zhang, Frank Alifui-Segbaya, Allan Rennie

Subject: Materials Science, General Materials Science Keywords: metal additive manufacturing; sintering; tensile; mechanical analysis; metal material extrusion

Online: 2 August 2020 (11:50:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0612.v1

Structural, Magnetic, and Mechanical Properties of Nd₁₆(Fe_76-xCo_x)B₈ 0 ≤ x ≤ 25 Alloys

Juan Sebastián Trujillo Hernández, Ahmed Talaat, Jesus A. Tabares, Dagoberto Oyola Lozano, Humberto Bustos Rodriguez, Hugo Martinez Sanchez, German A. Pérez Alcázar

Subject: Materials Science, General Materials Science Keywords: Mössbauer spectroscopy; X-ray diffraction; Vibrating sample magnetometry; NdFeB magnets

Online: 25 July 2020 (15:54:31 CEST)

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Preprint REVIEW | doi:10.20944/preprints202007.0514.v1

Review on Multi-Pass Friction Stir Processing of Aluminium Alloys

Oritonda Muribwathoho, Sipokazi Mabuwa, Velaphi Msomi

Subject: Materials Science, General Materials Science Keywords: tensile strength; ductility; microstructure

Online: 22 July 2020 (11:01:00 CEST)

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Working Paper ARTICLE

Negative Effective Mass in Plasmonic Systems, II: Elucidating of Optical and Acoustical Branches of Vibrations and the Possibility of Anti-Resonance Propagation

Edward Bormashenko, Irina Legchenkova, Mark Frenkel

Subject: Materials Science, General Materials Science Keywords: metamaterials; negative effective mass; plasma oscillations; low frequency plasmons; optical and acoustical branches.

Online: 21 July 2020 (13:38:18 CEST)

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Working Paper ARTICLE

High Fidelity Simulation of Ultrafine PM Filtration by Multiscale Fibrous Media Characterized by a Combination of X-Ray CT and FIB-SEM

Zhengyuan Pan, Xiaole Zhang, Zhaoxia Sun, Fuze Jiang, Luchan Lin, Yun Liang, Min Tang, Jing Wang

Subject: Materials Science, General Materials Science Keywords: nanofiber; multiscale; X-ray tomography; composite filter media; numerical simulation

Online: 20 July 2020 (11:28:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0433.v1

Cu-Doped KCl Unfolded Band Structure and Optical Properties Studied by DFT Calculations

Cesar Castillo-Quevedo, Jose Luis Cabellos, Raul Aceves, Roberto Núñez-González, Alvaro Posada-Amarillas

Subject: Materials Science, General Materials Science Keywords: DFT calculations; unfolding band structure; optical spectrum; KCl

Online: 19 July 2020 (20:22:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0149.v1

Tuning of Molecular Electrostatic Potential Enables Efficient Charge Transport in Crystalline Azaacenes: A Computational Study

Andrey Sosorev, Dmitry Dominskiy, Ivan Chernyshov, Roman Efremov

Subject: Materials Science, General Materials Science Keywords: organic electronics; organic semiconductors; molecular design; crystal design; π-stacking; charge mobility

Online: 8 July 2020 (11:23:32 CEST)

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Preprint REVIEW | doi:10.20944/preprints202007.0107.v1

Optimization of Magnetic Properties of Magnetic Microwires by Post-Processing

Valentina Zhukova, Paula Corte-León, Lorena Gonzalez-Legarreta, Ahmed Talaat, Juan Maria Blanco, Mihail Ipatov, Jesus Olivera, Arcady Zhukov

Subject: Materials Science, General Materials Science Keywords: Magnetic microwires; post-processing; hysteresis loops; magnetic anisotropy

Online: 7 July 2020 (02:41:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0056.v1

A Theoretical and Experimental Study on the Potential Luminescent and Biological Activities of Diaminodicyanoquinodimethane Derivatives

Edison Rafael Jimenez, Manuel Caetano, Nelson Santiago, F. Javier Torres, Thibault Terencio, Hortensia Rodriguez

Subject: Materials Science, General Materials Science Keywords: Aggregation-induced emission; quinones; fluorescence; TD-DFT; quantum yield

Online: 5 July 2020 (08:38:20 CEST)

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Preprint REVIEW | doi:10.20944/preprints202006.0132.v1

A Brief Review of Materials and Designs for Homemade Masks to Protect Against COVID-19

Jago Strong-Wright

Subject: Materials Science, General Materials Science Keywords: COVID-19; SARS-CoV-2; masks materials; pandemic

Online: 11 June 2020 (11:44:17 CEST)

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Working Paper ARTICLE

Hot Deformation Behavior and Microstructure Evolution of the Dual-Scale SiCp/A356 Composites Based on Optimal Hot Processing Parameters

Yahu Song, Aiqin Wang, Douqin Ma, Jingpei Xie, Zhen Wang, Pei Liu

Subject: Materials Science, General Materials Science Keywords: dual-scale SiCp/A356 composites; hot deformation behavior; microstructure; constitutive equation; processing map

Online: 17 May 2020 (08:39:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0246.v1

Effects of Heat Treatment Temperature on Microstructure and Mechanical Properties of M2 High-Speed Steel Selective Laser Melting Samples

Huan Ding, Xiong Xiang, Rutie Liu, Jie Xu

Subject: Materials Science, General Materials Science Keywords: high-speed steel (HSS); selective laser melting (SLM); annealing; microstructure; hardness; flexural strength

Online: 15 May 2020 (03:42:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0185.v1

An Empirical Model of Submicrocrystalline Structure Formation and Hardening upon Severe Plastic Deformation in Iron

Mikhail I. Degtyarev, Tatiana I. Chashchukhina, Lyudmila M. Voronova, Alexander M. Patselov, Vitaliy P. Pilyugin, Evgueni F. Talantsev

Subject: Materials Science, General Materials Science Keywords: severe plastic deformation; iron hardness; micro/nano-structure

Online: 11 May 2020 (03:33:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0526.v2

Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement

Jesús Rodríguez-Sánchez, Teresa Liberto, Catherine Barentin, Dag Kristian Dysthe

Subject: Materials Science, General Materials Science Keywords: calcium carbonate cement; setting reaction; (re)crystallization kinetics; cement strengthening; crystal bridging

Online: 6 May 2020 (14:50:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202004.0185.v1

Experimental Research and Numerical Analysis of the Elastic Properties of Paper Cell Cores Before and After Impregnation

Michał Słonina, Dorota Dziurka, Jerzy Smardzewski

Subject: Materials Science, General Materials Science Keywords: paper core; impregnation; elastic properties; experiment; FEM

Online: 12 April 2020 (08:28:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202004.0147.v1

Effect of Annealing Time and Temperature Parameters on the Microstructure, Hardness and Strain-Hardening Coefficients of 42CrMo4 Steel

Mirosław Szala, Grzegorz Winiarski, Łukasz Wójcik, Tomasz Bulzak

Subject: Materials Science, General Materials Science Keywords: steel; microstructure; annealing; upsetting; hardness; strain-hardening

Online: 9 April 2020 (09:54:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201912.0338.v2

Effect of Artificial Aging Treatment and lubrication Modes on the Machinability of A356 Cast Alloys

Mohamed Amine Alliche, Abdelhakim Djebara, Yasser Zedan, Victor Songmene

Subject: Materials Science, General Materials Science Keywords: aluminum alloys; artificial aging; drilling; surface quality; cutting fluid; burr formation

Online: 27 March 2020 (02:54:29 CET)

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Working Paper ARTICLE

Data-Oriented Constitutive Modeling of Plasticity in Metals

Alexander Hartmaier

Subject: Materials Science, General Materials Science Keywords: plasticity; machine learning; constitutive modeling

Online: 26 March 2020 (14:51:50 CET)

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Preprint CONCEPT PAPER | doi:10.20944/preprints202003.0169.v1

Direct Ink Writing Glass: A Preliminary Step for Optical Application

Bo Nan, Przemysław Gołębiewski, Ryszard Buczyński, F.J. Galindo Rosales, José Ferreira

Subject: Materials Science, General Materials Science Keywords: direct ink writing; glass; rheology

Online: 10 March 2020 (11:18:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0164.v1

Data-Oriented Constitutive Modeling of Plasticity in Metals

Alexander Hartmaier

Subject: Materials Science, General Materials Science Keywords: plasticity; machine learning; constitutive modeling

Online: 10 March 2020 (10:42:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0154.v1

Dynamic Shear Deformation of a Precipitation Hardened Al_0.7CoCrFeNi Eutectic High-Entropy Alloy Using Hat-Shaped Specimen Geometry

Bharat Gwalani, Tianhao Wang, Abhinav Jagetia, Sindhura Gangireddy, Saideep Muskeri, Sundeep Mukherjee, Jeffrey T. Lloyd, Rajarshi Banerjee, Rajiv S. Mishra

Subject: Materials Science, General Materials Science Keywords: eutectic high-entropy alloy; dynamic shear deformation; split-Hopkinson pressure bar test; hat-shaped specimen; nano-indentation

Online: 10 March 2020 (03:09:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0089.v1

Amino-modified Silica as Effective Support of the Palladium Catalyst of Hydrogenation

Adele R. Latypova, Maxim D. Lebedev, Evgeniy V. Rumyantsev, Dmitry V. Filippov, Olga V. Lefedova, Alexey V. Bykov, Valentin Yu. Doluda

Subject: Materials Science, General Materials Science Keywords: sol-gel; amino-functionalized silica; catalyst; activity; hydrogenation

Online: 5 March 2020 (12:05:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0083.v1

Simulation-based Understanding of the Critical Resolved Shear Stress Relevance for the Fatigue Performance of Metallic Materials

Marijo Mlikota, Siegfried Schmauder

Subject: Materials Science, General Materials Science Keywords: multiscale simulation; fatigue; metals; CRSS; endurance limit

Online: 5 March 2020 (11:33:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0464.v1

C_0.3N_0.7Ti-SiC Toughed Silicon Nitride Hybrids with Non-Oxide Additives Ti₃SiC₂

Heng Luo, Chen Li, Lianwen Deng, Yang Li, Peng Xiao, Haibin Zhang

Subject: Materials Science, General Materials Science Keywords: Ti3SiC2; Si3N4; mechanical properties; fracture toughness

Online: 29 February 2020 (10:30:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0320.v1

Highly Molybdenum-Alloyed Materials Hastelloy BC-1 (2.4708) and B3 (2.4600): Diffusion Bonding Experiments and Evaluation of Both Mechanical Behavior and Corrosion Resistance in Hot 70 % Sulfuric Acid

Thomas Gietzelt, Mario Walter, Volker Toth, Florian Messerschmidt, Ralf Dahm

Subject: Materials Science, General Materials Science Keywords: diffusion bonding; Hastelloy B; corrosion; sulfuric acid; micro process device

Online: 23 February 2020 (12:00:15 CET)

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Sulphuric acid is a widely used raw material in the chemical industry. Its corrosive effect on materials varies considerably, depending on impurities, temperature and water content. Accordingly, good corrosion resistance under all conditions is very difficult to achieve. This is especially an issue for micro process apparatus with very thin walls. Furthermore, such devices are often joint by diffusion bonding what may alter materials properties due to high temperatures and long dwell times. In fact, for each new material, the diffusion bonding parameters must be optimized and the impact on mechanical as well as corrosion properties must be investigated. In this paper, two high molybdenum alloys, namely Hastelloy B3 and BC-1, were evaluated. Diffusion bonding tests were performed using ten layers of sheet material in between round stock. Corrosion tests were performed in 70 % sulphuric acid at 100°C for 1000 h. Tensile tests on both alloys were carried out for different material conditions, to determine the change in mechanical strength and elongation at fracture values. In general, independent of the condition of the materials, the fracture behavior of both alloys was found to be ductile and the specimens show the typical dimple structure, in the case of diffusion bonded samples, interrupted by weak spots or rather non-bonded areas. These areas are obviously causing the onset of material failure and thus, a degradation of mechanical properties. Tensile samples, that were aged in 70% sulphuric acid at 100°C for 1000 hours showed local corrosion attacks at the grain boundaries at the circumferential surfaces and especially at the joining planes – for Hastelloy B3 much more pronounced than for Hastelloy BC-1. Accordingly, a further decrease of both, the stress- and elongation at fracture values is observed. However, the typical material parameters like 0.2 % yield strength used for dimensioning components are found to be sufficient high, even when operating the materials under such harsh conditions. When concluding the results, at least Hastelloy BC-1 reveals both sufficient good mechanical properties and an excellent corrosion resistance, regardless of the heat treatment, and could be considered for manufacturing micro-process engineering apparatuses operated in a sulphuric acid environment. This is a significant advance compared to the results obtained within a AiF project, previously carried out on four different materials to investigate the corrosion resistance in sulphuric acid.

Preprint ARTICLE | doi:10.20944/preprints202002.0188.v1

Interfacial Phenomena between Liquid Si-Rich Si-Zr Alloys and Glassy Carbon

Donatella Giuranno, Wojciech Polkowski, Grzegorz Bruzda, Artur Kudyba, Javier Narciso

Subject: Materials Science, General Materials Science Keywords: MMCs; Silicon Carbide; Wetting; Refractory materials; Zr-Silicides

Online: 14 February 2020 (04:28:22 CET)

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Working Paper ARTICLE

A Novel Approach for Improving Mechanical Properties in Friction Stir Butt Welded AA6061 Aluminum Plates by Using Preheat

Hossein Amirabadi, Nasrollah Bani Mostafa Arab, Seyed vahid Safi

Subject: Materials Science, General Materials Science Keywords: friction stir welding; aluminum alloy; preheating; mechanical properties; microstructure

Online: 14 February 2020 (03:02:51 CET)

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Preprint REVIEW | doi:10.20944/preprints202002.0112.v1

Electrolytes for Energy Dense Batteries

Rana Mohtadi

Subject: Materials Science, General Materials Science Keywords: electrolyte; hydride; battery

Online: 9 February 2020 (17:11:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0030.v1

Microstructure and Mechanical Properties of the Ni/Ti/Nb Multilayer Composite Manufactured by Accumulative Pack-roll Bonding

Nan Ye, Xue-ping Ren

Subject: Materials Science, General Materials Science Keywords: Ni/Ti/Nb multilayer composite; accumulative roll bonding; microstructure; mechanical properties

Online: 3 February 2020 (11:00:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202001.0192.v1

Multivalent Lactose–Ferrocene Conjugates Based on Poly(Amido Amine) Dendrimers and Gold Nanoparticles as Electrochemical Probes for Sensing Galectin-3

Manuel C. Martos-Maldonado, Indalecio Quesada-Soriano, Luis García-Fuentes, Antonio Vargas-Berenguel

Subject: Materials Science, General Materials Science Keywords: galectin-3; electrochemical probes; gold nanoparticles; ferrocene; electroactive glycodendrimers; PAMAM

Online: 17 January 2020 (10:58:19 CET)

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MATERIALS SCIENCE