Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Bio-Functionalization of a Novel Biocompatible High Entropy Alloy Used For Bone Implants

Version 1 : Received: 9 April 2021 / Approved: 9 April 2021 / Online: 9 April 2021 (13:24:09 CEST)

How to cite: Codescu, M.M.; Vladescu, A.; Geanta, V.; Voiculescu, I.; Pana, I.; Dinu, M.; Kiss, A.E.; Braic, V.; PATROI, D.; MARINESCU, V.E.; Mihai, I. Bio-Functionalization of a Novel Biocompatible High Entropy Alloy Used For Bone Implants. Preprints 2021, 2021040259 (doi: 10.20944/preprints202104.0259.v1). Codescu, M.M.; Vladescu, A.; Geanta, V.; Voiculescu, I.; Pana, I.; Dinu, M.; Kiss, A.E.; Braic, V.; PATROI, D.; MARINESCU, V.E.; Mihai, I. Bio-Functionalization of a Novel Biocompatible High Entropy Alloy Used For Bone Implants. Preprints 2021, 2021040259 (doi: 10.20944/preprints202104.0259.v1).

Abstract

In this paper, a novel biocompatible alloy defined as FeMoTaTiZr was obtained and functionalized by hydroxyapatite-based coatings (HAP) in order to increase their biocompatibility, bioactivity, and resistance to corrosion for to be used as bone implants. To obtain the surface with antibacterial properties, the HAP coatings were doped with small amount of Zn. The alloy was prepared using the VAR (Vacuum Arc Remelting) equipment, while the coatings by RF magnetron sputtering method. The EDS analysis confirmed the presence of Ca and P in the case of all developed coatings, having Ca/P or Ca/(P+Zn) ratio of about 1.70 and 1.66, respectively. The XRD and ATR-FTIR investigations confirmed the presence of calcium phosphate phases. The roughness of uncoated substrates increased after coating with HAP, and it was considerably increased by the Zn addition. The electrochemical tests showed that the un-doped HAP exhibited good corrosion behavior, while Zn doped HAP coatings have a high dissolution rate in fetal bovine serum, being more proper as a biodegradable material.

Subject Areas

VAR alloy obtaining; Biomedical applications; Apatite films; Corrosion, X-ray method, Electron microscopy; Hardness

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