Correlation of the wear transition in CoCrMo alloys with the formation of a nanocrystalline surface layer and a proteinaceous surface film
Correlation of the wear transition in CoCrMo alloys with the formation of a nanocrystalline surface layer and a proteinaceous surface film
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CoCrMo 合金磨损转变与纳米晶表面层和蛋白质表面膜形成的相关性
DOI：
10.1016/j.wear.2016.11.046
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发表时间：
2017
期刊：
影响因子：
5
通讯作者：
W. M. Rainforth
中科院分区：
文献类型：
--
作者：
R. Namus;P. Zeng;W. M. Rainforth
CoCrMo合金已广泛用于金属对金属（MoM）髋关节置换术。一方面，它们表现出极好的长期存活率，但最近观察到与不良局部组织反应相关的高失败率。为什么CoCrMo合金有时工作得很好，而在其他时候磨损率高得令人无法接受，这仍然是一个谜。有几份报告表明，表面蛋白质层的形成似乎会降低磨损率。同样，已经观察到表面纳米晶层的形成，但仍不清楚这是好现象还是坏现象。目前的工作直接相关的表面变形结构和存在的蛋白质膜的磨损行为。最低的比磨损率与蛋白质层的形成有关。在较高载荷下观察到磨损转变，与蛋白质层的损失和厚的表面纳米晶层的形成相关。蛋白质层的形成似乎与CoCrMo的一些表面变形有关，这可能会去除表面氧化物。虽然厚，细纳米晶层的形成导致最高的表面硬度和屈服强度，它也符合最高的磨损率。
CoCrMo alloys have been widely used in metal-on-metal (MoM) hip replacements. On the one hand, they have exhibited excellent long-term survival rates, but recently high failure rates have been observed, associated with adverse local tissue reactions. It is still a puzzle why CoCrMo alloys sometimes work very well, while at the other times the wear rate is unacceptably high. There have been several reports that the formation of a surface proteinaceous layer appears to reduce the wear rate. Equally, the formation of a surface nanocrystalline layer has been observed, but it remains unclear whether this is a good or bad phenomena. The present work directly correlates the surface deformation structure and the presence of a proteinaceous film with the wear behaviour. The lowest specific wear rates were associated with the formation of a proteinaceous layer. A wear transition was observed at higher load, associated with the loss of the proteinaceous layer and the formation of a thick surface nanocrystalline layer. The formation of the proteinaceous layer appeared to be associated with some surface deformation of the CoCrMo, which presumably removed the surface oxide. Although the formation of a thick, fine nanocrystalline layer resulted in the highest surface hardness and yield strength, it also coincided with the highest wear rate.
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DOI：
10.1016/j.jmbbm.2011.09.008
发表时间：
2012-02-01
影响因子：
3.9
作者：
Myant, C.;Underwood, R.;Cann, P. M.
通讯作者：
Cann, P. M.
影响因子：
5
作者：
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通讯作者：
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影响因子：
5
作者：
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通讯作者：
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影响因子：
6.2
作者：
Zeng P
通讯作者：
Zeng P