作　　者： ; ; ; ; ; ;

机构地区： 沈阳工业大学

出　　处： 《稀有金属材料与工程》 2008年第10期1772-1775,共4页

摘　　要： NiTi形状记忆合金是一种极具发展前景的医用植入材料。采用SRVⅢ摩擦磨损试验机考察了NiTi形状记忆合金在蒸馏水介质中的微动磨损性能,研究法向载荷对NiTi合金磨损机制的影响规律。利用扫描电子显微镜及能谱仪分析NiTi形状记忆合金表面磨痕形貌及磨损产物成分。用形貌仪测量样品表面磨痕深度,并对磨损体积进行计算。实验结果表明:NiTi合金在蒸馏水介质中的微动磨损摩擦系数、磨损体积均随着载荷的增大而增大。微动磨损失效机制以磨粒磨损以及疲劳剥层断裂为主。 NiTi shape memory alloy （SMA） is one of the most promising medical implant materials. The fretting behavior ofNiTi SMA in distilled water was studied on a SRVⅢ friction and wear tester. The influence of load on wear mechanism ofNiTi SMA was investigated. The surface morphologies and the component of wear debris were examined by scanning electron microscopy （SEM） and energy dispersive spectroscope （EDS）. The wear depth was investigated by surface profiler. The wear volume was also calculated. The results show that the friction coefficient and the wear volume of NiTi SMA in distilled water were increased with the increase of load. The fretting wear mechanism was mainly grain abrasive and fatigue flake mechanism.

关 键 词： 生物材料 形状记忆合金 微动磨损 磨损机制

领　　域： [机械工程]