Preliminary investigation on the bio-tribocorrosion behavior of porous nanostructured ?-type titanium based biomedical alloys

By Fellah, Mamoun; Hezil, Naouel; Hussein, Mohamed A.; Samad, Mohammed Abdul; Touhami, Mohamed Zine; Montagne, Alex; Iost, Alain; Obrosov, Aleksei; Weiss, Sabine
Published in Materials Letters 2019

Abstract

The bio-tribocorrosion behavior of newly developed near ?-types Ti-15Nb and Ti-15Mo alloys was investigated in Phosphate-Buffered Saline (PBS) under different loads. Open-Circuit Potential (OCP), friction coefficient, wear volume and wear rate were evaluated. The results revealed that Ti-15Nb alloy exhibited lower wear rate, lower friction coefficient and better corrosion resistance during tribocorrosion than the Ti-15Mo alloy. This can be attributed to the diffusion of Nb which increases the repassivation rate (formation of a protective layer) in the Ti-15Nb alloy. In contrast Ti-15Mo shows a significantly higher rate of chemical reaction.

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