Development of high Zr-containing Ti-based alloys with low Young's modulus for use in removable implants

作者：Zhao Xiaoli; Niinomi Mitsuo^*; Nakai Masaaki; Ishimoto Takuya; Nakano Takayoshi

来源：Materials Science & Engineering C-Materials for Biological Applications, 2011, 31(7): 1436-1444.

DOI：10.1016/j.msec.2011.05.013

• High Zr-containing Ti alloys
• Microstructure
• Mechanical property
• Cell culture test

This research focuses on the development of new titanium (Ti) alloys with a low Young's modulus for use in removable implants. In this study. Ti-30Zr alloy was selected as the base alloy, and the effect of Mo addition on the microstructures, Young's moduli, and tensile properties of Ti-30Zr-(0-8 wt.% Mo) alloys was investigated in this study to assess the mechanical compatibility of these alloys for biomedical applications. Further, the cytocompatibility of a part of the designed alloys was examined. The experimental results indicate that both the microstructures and the mechanical properties of the designed alloys are strongly affected by the Mo contents. The Ti-30Zr-(6, 7 wt.%) Mo alloys, located near the boundary of (beta+omega)/beta with a metastable structure, show a good combination of a low Young's modulus, high tensile strength, fairly large elongation. In addition, Ti-30Zr-7Mo alloy is highly cytocompatible.

• 出版日期2011-10-10