Tribological behaviour of biomedical Ti-Zr-based shape memory alloys

• Published in: Rare metals Vol. 36; no. 6; pp. 478 - 484
• Main Authors: Qu, Wen-Tao, Sun, Xu-Guang, Yuan, Bi-Fei, Li, Kang-Ming, Wang, Zhen-Guo, Li, Yan
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 01.06.2017; Springer Nature B.V
• Subjects: Abrasive wear; Adhesive wear; Biomaterials; Biomedical materials; Body centered cubic lattice; Chemistry and Materials Science; Delamination; Energy; Friction resistance; Hardness; Iron oxides; Martensite; Materials Engineering; Materials Science; Metallic Materials; Nanoscale Science and Technology; Physical Chemistry; Shape memory alloys; Titanium base alloys; Tribology; Wear resistance; Wear tests; X射线衍射; 医用; 形状记忆合金; 摩擦学性能; 摩擦磨损试验; 生物; 耐磨性能; 锆基; Biomedical material; Ti–Zr; Shape memory alloy; Tribology
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-017-0882-0

The tribological behaviour of Ti-30Zr, Ti-20Zr-10Nb and Ti-19Zr-10Nb-1Fe alloys was investigated using reciprocating friction and wear tests. X-ray diffraction（XRD） results indicate that Ti-30Zr, Ti-20Zr-10Nb and Ti-19Zr-10Nb-1Fe alloys are composed of hexagonal a＇-martensite, orthorhombic a＇＇-martensite and bcc β phases,respectively. Ti-30Zr alloy has the highest hardness of HV（273.1 ± 9.3）, while Ti-20Zr-10Nb alloy exhibits the lowest hardness of HV（235.2 ± 20.4） among all the alloys.The tribological results indicate that Ti-30Zr alloy shows the best wear resistance among these alloys, corresponding to the minimum average friction coefficient of 0.052 and the lowest wear rate of 6.4x10^-4mm3·N^-1·m^-1. Ti-20Zr-10Nb alloy displays better wear resistance than Ti-19Zr-10Nb-1Fe alloy, because the iron oxide is easy to fall off and less Nb2O5 films form on the worn surface of the latter.Delamination and abrasive wear in association with adhesive wear are the main wear mechanism of these alloys.