Micro-Particles of High Entropy Alloys Made by Laser Induced Forward Transfer

Molong Han; Ashok Meghwal; Soon Hock Ng; Daniel Smith; Haoran Mu; Tomas Katkus; De Ming Zhu; Reiza Mukhlis; Jitraporn Vongsvivut; Christopher C Berndt; Andrew S. M. Ang; Saulius Juodkazis

doi:10.20944/preprints202209.0392.v1

A peer-reviewed article of this Preprint also exists.

Han, M.; Meghwal, A.; Ng, S.H.; Smith, D.; Mu, H.; Katkus, T.; Zhu, D.M.; Mukhlis, R.; Vongsvivut, J.; Berndt, C.C.; Ang, A.S.M.; Juodkazis, S. Microparticles of High Entropy Alloys Made by Laser-Induced Forward Transfer. Materials 2022, 15, 8063. Han, M.; Meghwal, A.; Ng, S.H.; Smith, D.; Mu, H.; Katkus, T.; Zhu, D.M.; Mukhlis, R.; Vongsvivut, J.; Berndt, C.C.; Ang, A.S.M.; Juodkazis, S. Microparticles of High Entropy Alloys Made by Laser-Induced Forward Transfer. Materials 2022, 15, 8063.

Abstract

Controlled deposition of CoCrFeNiMo0.2 high entropy alloy (HEA) micro-particles was achieved using laser induced forward transfer (LIFT). Ultra-short laser pulses, 230 fs of 515 nm wavelength, were tightly focused into ∼ 2.4 μm focal spots on the ∼50 nm thick plasma-sputtered films of CoCrFeNiMo0.2. The HTA films were transferred onto glass substrates by magnetron sputtering in vacuum (10−8 atm) from the thermal spray coated substrates. The absorption coefficient of CoCrFeNiMo0.2 α ≈ 6 × 105 cm−1 was determined at 600 nm wavelength. The real and imaginary parts of refractive index (n + iκ) of HEA were determined from reflectance and transmittance using nano-films.

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Micro-Particles of High Entropy Alloys Made by Laser Induced Forward Transfer

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