Fabrication and Mechanical Properties of Porous Ti-24Nb-4Zr-8Sn Alloy Devel-oped for Biomedical Application
Metal-based porous materials are currently the preferred choice as bone/cartilage implants due to their idiographic porosity improving the biocompatibility of implants. Ti-24Nb-4Zr-8Sn (in weight percent and abbreviated as Ti2448) is a new beta-type titanium alloy developed for biomedical application. The alloy possesses low modulus, high strength, good corrosion resistance in the physiological environment and non-toxicity. This study focuses on the fabrication and mechanical properties of porous Ti2448 alloy aimed for use as load-bearing implants. A bulk porous biomedical Ti2448 alloy was prepared by powder-metallurgy technique including cold-roll forming and vacuum sintering. The effects of processing parameters, such as rolling reduction, size and volume percentage of space-holder on porosity, average pore size, compressive strength and Youngs modulus of porous Ti2448 alloy were investigated. The results showed that porous Ti2448 alloys of 17.6％~46. 8％ in porosity, 166~ 509 μm in average pore diameter,30~325 MPa in compressive strength and 2. 3~27. 2 GPa in dynamic modulus can be fabricated by controlling process parameters. Compared with porous CP Ti fabricated by the same method,porous Ti2448 alloy has much higher strength-to-modulus ratio and better mechanical compatibility, which may greatly reduce stiffness mismatch between implant and bone after implantation.
Biomedical titanium alloys porous Ti-2448 alloy elastic modulus rolling forming mechanical properties
Xuying Cheng Shujun Li Yulin Hao Rui Yang
Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,72 Wenhua Road,Shenyang 110016,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
2189-2192
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）