Advanced Material & Technology Institute, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Biomed Mater. 2011 Aug;6(4):045010. doi: 10.1088/1748-6041/6/4/045010. Epub 2011 Jul 11.
Porous titanium alloys have been prepared by gelcasting in this study. The elastic solid green body was first polymerized and then vacuum sintered to porous titanium alloys with low contamination by controlling sintering conditions. The microstructure and the total porosity of the vacuum sintered porous Ti-Co and Ti-Mo alloys were analyzed by using scanning electron microscopy and x-ray diffraction. Moreover, compression and bending tests were conducted to investigate their mechanical properties. The results show that open and closed three-dimensional pore morphologies and total porosity ranging from 38.34% to 58.32% can be achieved. In contrast to porous Ti by gelcasting, the compression and bending strengths of porous titanium alloys were significantly increased by adding Mo and Co with Young's modulus ranging between 7-25 GPa, which is close to that of human cortical bone, therefore being suited for potential application in load-bearing implants.
本研究采用凝胶注模法制备了多孔钛合金。通过控制烧结条件，先将弹性固体生坯聚合，然后真空烧结，制备出污染低的多孔钛合金。采用扫描电子显微镜和 X 射线衍射分析了真空烧结的多孔 Ti-Co 和 Ti-Mo 合金的微观结构和总孔隙率。此外，还进行了压缩和弯曲试验来研究它们的力学性能。结果表明，可获得开放和封闭的三维孔形态和总孔隙率为 38.34%至 58.32%。与凝胶注模的多孔 Ti 相比，添加杨氏模量在 7-25 GPa 之间的 Mo 和 Co 后，多孔钛合金的压缩和弯曲强度显著提高，接近人皮质骨，因此适用于承重植入物的潜在应用。
