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首页> 外文期刊>Key Engineering Materials >Fabrication and Fracture Properties of Nano-sized HAP-TZP (3Y) Bioceramic for Artificial Joints
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Fabrication and Fracture Properties of Nano-sized HAP-TZP (3Y) Bioceramic for Artificial Joints

机译：纳米HAP-TZP（3Y）生物陶瓷人工关节的制备及断裂性能

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摘要

Hydroxyapatite is a kind of ideal biomaterials for bone and teeth replacement, but its low strength and brittleness need to improve. As bone replacing materials, hydroxyapatite (HAP) and zirconia both have advantage and disadvantage. Nano-sized HAP-ZrO_2 powders and HAP-TZP (3Y) (3mol% yttria - stabilized cubic zirconia) bioceramic for artificial joint have been fabricated in this paper. The nano-sized HAP-ZrO_2 powders with homogeneous distribution could be synthesized by two-step precipitation method. The HAP-TZP bioceramic with small grain size could be obtained by using hot-press sintering technology, and the sintering parameters are: sintering temperatures T=1300℃, sintering pressure p=30MPa and sintering time t=30min. The mechanical properties, microstructures and fracture pattern that were analyzed by SEM and optical microscopy of the HAP-TZP bioceramic were investigated systematically. The results show that no reaction between HAP and ZrO_2 powders, which could be attributed to the very short sintering time of hot press sintering.
机译：羟基磷灰石是一种理想的生物材料，可替代骨骼和牙齿，但其低强度和脆性尚待改善。作为骨替代材料，羟基磷灰石（HAP）和氧化锆均具有优缺点。制备了纳米HAP-ZrO_2粉体和人工关节用HAP-TZP（3Y）（3mol％的氧化钇-稳定立方氧化锆）生物陶瓷。可以通过两步沉淀法合成具有均匀分布的纳米级HAP-ZrO_2粉末。采用热压烧结技术可以得到粒径较小的HAP-TZP生物陶瓷，其烧结参数为：烧结温度T = 1300℃，烧结压力p = 30MPa，烧结时间t = 30min。通过扫描电镜和光学显微镜对HAP-TZP生物陶瓷的力学性能，显微组织和断裂模式进行了系统研究。结果表明，HAP和ZrO_2粉末之间没有反应，这可归因于热压烧结的烧结时间非常短。

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