Güden Mustafa, Celik Emrah, Hizal Alpay, Altindiş Mustafa, Cetiner Sinan
Department of Mechanical Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir, Turkey.
J Biomed Mater Res B Appl Biomater. 2008 May;85(2):547-55. doi: 10.1002/jbm.b.30978.
Sintered Ti6Al4V powder compacts potentially to be used in implant applications were prepared using commercially available spherical and angular powders (100-200 mum) within the porosity range of 34-54%. Cylindrical green powder compacts were cold compacted at various pressures and then sintered at 1200 degrees C for 2 h. The final percent porosity and mean pore sizes were determined as functions of the applied compaction pressure and powder type. The mechanical properties were investigated through compression testing. Results have shown that yield strength of the powder compacts of 40-42% porosity was comparable with that of human cortical bone. As compared with previously investigated Ti powder compacts, Ti6Al4V powder compacts showed higher strength at similar porosity range. Microscopic observations on the failed compact samples revealed that failure occurred primarily by the separation of interparticle bond regions in the planes 45 degrees to the loading axis.
使用市售的球形和角形粉末（100 - 200微米）制备了孔隙率在34% - 54%范围内、有可能用于植入应用的烧结Ti6Al4V粉末压坯。圆柱形绿色粉末压坯在不同压力下进行冷压，然后在1200℃烧结2小时。最终孔隙率百分比和平均孔径被确定为所施加的压实压力和粉末类型的函数。通过压缩试验研究了力学性能。结果表明，孔隙率为40% - 42%的粉末压坯的屈服强度与人类皮质骨相当。与先前研究的钛粉末压坯相比，Ti6Al4V粉末压坯在相似的孔隙率范围内表现出更高的强度。对失效压坯样品的微观观察表明，失效主要发生在与加载轴成45度平面内的颗粒间结合区域的分离。
