Mechanical Properties and Biocompatibility of Ti-Nb-O, Ti-Ta-O, and Ti-Zr-O Alloys

摘要

The ideal biomedical implant materials should possess excellent biocompatibility, good corrosion resistance, high strength, and a low elastic modulus (as near as possible to that of human bone). Considerable efforts to achieve these goals have been made by material scientists and engineers. Ti and its alloys have been used thoroughly in the production of prostheses due to properties such as high corrosion resistance, a low elasticity modulus, a high mechanical strength/density ratio, and good biocompatibility. Ti-6A1-4V is the Ti alloy that is currently most widely used, but studies indicate cytotoxic effects in some tissues caused by V, while Al is associated with neurological disorders. Promising alloys to replace Ti-6A1-4V are those with Nb, Ta, and Zr, for example, substituted for a part of Ti. The purpose of this study is to investigate the effects of oxygen content on the mechanical properties and biocompatibility of binary Ti-Nb, Ti-Ta, and Ti-Ta alloys, to provide use&l data for the development of new Ti alloys to be used as biomaterial.