On the bio-corrosion and biocompatibility of TiTaNb medium entropy alloy films

Y.H. Chen; W.S. Chuang; J.C. Huang; X. Wang; H.S. Chou; Y.J. Lai; P.H. Lin

doi:10.1016/j.apsusc.2020.145307

Author(s)

W.S. Chuang
X. Wang
H.S. Chou
Y.J. Lai
P.H. Lin

Related Research Unit(s)

Detail(s)

Original language	English
Article number	145307
Journal / Publication	Applied Surface Science
Volume	508
Online published	8 Jan 2020
Publication status	Published - 1 Apr 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.apsusc.2020.145307 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85077745356&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(ae980d9e-9815-4c0f-9885-ca2f52d1362c).html

Abstract

Some high or medium entropy alloys (HEAs and MEAs) have been demonstrated to exhibit great mechanical and bio-corrosion properties to meet the demands as bio-implant materials. However, the difference in Young's modulus between these alloys and human bone would induce stress shielding effects. Therefore, HEA or MEA coating films appear to be potential materials since these films can be coated on appropriate implant devices as surface modification. This study employs sputtering to produce equimolar TiTaNb MEA film and a titanium-based Ti-10Ta-6Nb film in order to compare their mechanical and bio-corrosion properties. The results indicate that the TiTaNb MEA films have higher hardness, higher wear resistance, greater biocompatibility and superior bio-corrosion resistance, likely to be a high potential bio-implant coating materials. The underlying related chemical reactions and mechanisms are also explored and discussed.