Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses
Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses
复制标题
DOI：
10.1016/s0142-9612(01)00206-x
复制
发表时间：
2002-02-01
期刊：
影响因子：
14
通讯作者：
Torrecillas, R
中科院分区：
文献类型：
--
作者：
De Aza, AH;Chevalier, J;Torrecillas, R
单相生物陶瓷（氧化铝和氧化锆）广泛用作全髋关节置换术（THR）中的股骨头，作为金属装置的替代品。不幸的是，骨科社区报告了重大的体内失败，材料科学家已经熟悉了氧化铝-氧化锆等复合材料。由于两者都具有生物相容性，这可能被证明是一种新的植入方法。本文研究了新一代抗裂纹扩展的氧化铝-氧化锆纳米复合材料，为提高陶瓷关节假体的使用寿命和可靠性提供了一种选择。通过对上述三种生物陶瓷（氧化铝、氧化锆和氧化锆增韧氧化铝）的慢裂纹扩展行为的研究，分析了它们作为THR元件的可靠性。讨论了工艺条件对氧化锆增韧氧化铝复合材料微观组织发育的影响以及这些微观组织对其力学性能的影响。(C) 2001年Elsevier Science Ltd.出版
Mono-phase bio-ceramics (alumina and zirconia) are widely used as femoral heads in total hip replacements (THR) as an alternative to metal devices. Unfortunately, the orthopaedic community reports significant in-vivo failures, Material scientists are already familiar with composites like alumina-zirconia. Since both are biocompatible, this could prove to be a new approach to implants. This paper deals with a new generation of alumina-zirconia nano-composites having a high resistance to crack propagation, and as a consequence may offer the option to improve lifetime and reliability of ceramic joint prostheses. The reliability of the above mentioned three bio-ceramics (alumina, zirconia and zirconia toughened alumina) for THR components is analysed based on the study of their slow crack-growth behaviour. The influence of the processing conditions on the microstructure development, of the zirconia toughened alumina composites and the effect of these microstructures, on its mechanical properties, are discussed. (C) 2001 Published by Elsevier Science Ltd.