Effects of compaction pressure and particle shape on the porosity and compression mechanical properties of sintered Ti6Al4V powder compacts for hard tissue implantation
Effects of compaction pressure and particle shape on the porosity and compression mechanical properties of sintered Ti6Al4V powder compacts for hard tissue implantation
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DOI：
10.1002/jbm.b.30978
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发表时间：
2008-05-01
影响因子：
3.4
通讯作者：
Cetiner, Sinan
中科院分区：
文献类型：
--
作者：
Guden, Mustafa;Celik, Emrah;Cetiner, Sinan
使用商业上可获得的球形和角形粉末（100-200 μ m），在34- 54%的孔隙率范围内，制备可能用于植入物应用的烧结的Ti6 Al 4V粉末压块。将圆柱形绿色粉末压坯在各种压力下冷压，然后在1200 ℃下烧结2小时。最终的孔隙率和平均孔径百分比作为施加的压实压力和粉末类型的函数来确定。通过压缩试验研究了其力学性能。结果表明，40-42%孔隙率的粉末压块的屈服强度与人皮质骨的屈服强度相当。与以前研究的Ti粉末压坯相比，Ti6 Al 4V粉末压坯在相似的孔隙率范围内显示出更高的强度。对失效的致密样品的显微镜观察显示，失效主要是由于与载荷轴成45度的平面中颗粒间粘合区域的分离而发生的。(C)2007 Wiley Periodicals，Inc.
Sintered Ti6Al4V powder compacts potentially to be used in implant applications were prepared using commercially available spherical and angular powders (100-200 mu m) 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. (C) 2007 Wiley Periodicals, Inc.