Dynamic surface microstructural changes during tribological contact that determine the wear behaviour of hip prostheses: metals and ceramics.
Dynamic surface microstructural changes during tribological contact that determine the wear behaviour of hip prostheses: metals and ceramics.
复制标题
摩擦接触过程中动态表面微观结构的变化决定了髋关节假体（金属和陶瓷）的磨损行为。
DOI：
10.1039/c2fd00002d
复制
发表时间：
2012
影响因子：
3.4
通讯作者：
T. Stewart
中科院分区：
文献类型：
--
作者：
W. M. Rainforth;P. Zeng;Le Ma;Akemi Nogiwa Valdez;T. Stewart
摩擦接触引起的动态微观结构变化通常决定材料是否具有良好的耐磨性。众所周知，表面的机械性能与本体显著不同，磨损引起的塑性变形和电化学效应放大了这种效应。尽管这些动态微观结构变化的重要性，仍然很少有定量的了解如何在摩擦接触过程中的表面微观结构的变化，以及如何修改表面的机械性能和化学活性。本文将重点关注关键的全髋关节置换术材料，特别是CoCrMo合金、第三代和第四代氧化铝/氧化锆增韧氧化铝。高分辨率技术已被用于在体内和体外样品的磨损引起的微观结构的变化，这提供了新的见解的磨损机制。结果进行了详细讨论，特别是，他们如何告知未来的材料开发这一重要的应用。
It is often the dynamic microstructural changes induced by tribological contact that determine whether or not a material exhibits good wear resistance. It is well known that the mechanical properties of a surface are significantly different from the bulk, an effect amplified by wear induced plastic deformation and electrochemical effects. Despite the importance of these dynamic microstructural changes, there remains little quantitative understanding of how the surface microstructure changes during tribo-contact, and how this modifies the surface mechanical properties and chemical activity. This contribution will focus on key total hip arthroplasty materials, specifically CoCrMo alloys, third and fourth generation alumina/zirconia toughened alumina. High resolution techniques have been used to characterise the wear induced microstructural changes for both in vivo and in vitro samples, which has provided new insight into the wear mechanisms. The results are discussed in detail, in particular, how they inform future materials development for this important application.