Fabrication and Mechanical Properties of Porous Ti/HA Composites for Bone Fixation Devices
Fabrication and Mechanical Properties of Porous Ti/HA Composites for Bone Fixation Devices
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DOI：
10.2320/matertrans.m2010092
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发表时间：
2010-08-01
影响因子：
1.2
通讯作者：
Hanawa, Takao
中科院分区：
文献类型：
--
作者：
Nomura, Naoyuki;Sakamoto, Kozue;Hanawa, Takao
采用真空渗透法和烧结法制备了多孔钛（pTi）/羟基磷灰石（HA）复合材料。在浸入汉克斯溶液之前和之后评估复合材料的杨氏模量。复合材料的强度也通过四点弯曲试验进行了评估。压坯的杨氏模量受孔隙率控制，在孔隙率 24% 至 34% 范围内与人骨相当。烧结pTi/HA复合材料的杨氏模量比pTi大。烧结的 pTi/HA 复合材料的杨氏模量在浸入 Hanks 溶液后下降。烧结pTi/HA复合材料的屈服强度和弯曲强度均大于pTi。 Ti的氧固溶强化有助于提高屈服强度。 [doi:10.2320/matertrans.M2010092]
Porous Ti (pTi)/hydroxylapatite (HA) composites were fabricated by an infiltration method in a vacuum and sintering. The Young's modulus of the composites was evaluated before and after the immersion in Hanks' solution. The strength of the composites was also evaluated by four-point bending test. The Young's modulus of the compacts was governed by the porosity and was comparable to the human bone in the porosity range from 24 to 34%. The Young's modulus of sintered pTi/HA composites was larger than that of pTi. The Young's modulus of the sintered pTi/HA composites decreased after immersion in Hanks' solution. The proof and bending strengths of the sintered pTi/HA composites were larger than those of pTi. Solid solution hardening of Ti by oxygen contributed the increase of the proof strength. [doi:10.2320/matertrans.M2010092]