The composition of tribofilms produced on metal-on-metal hip bearings
The composition of tribofilms produced on metal-on-metal hip bearings
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DOI：
10.1016/j.biomaterials.2013.11.065
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发表时间：
2014-02-01
期刊：
影响因子：
14
通讯作者：
Neville, Anne
中科院分区：
文献类型：
--
作者：
Hesketh, James;Ward, Michael;Neville, Anne
在髋关节模拟器中进行磨损测试后，36 mm金属对金属全髋关节置换物的关节面显示出摩擦化学层的形成。在透射电子显微镜中研究这些层，并使用电子能量损失谱、能量色散X射线和选区电子衍射进行分析。在磨痕边缘处形成的摩擦膜为100纳米厚，并且包含嵌入其中的硫化钴颗粒。膜本身富含碳，并且似乎不包含长程石墨有序，当用电子能量损失谱分析时，从摩擦膜收集的光谱与从无定形碳收集的光谱非常相似。最显著的摩擦层形成的位置可以通过在轴承表面保形变化后在磨痕边缘形成钝楔来解释。(C)2013爱思唯尔有限公司保留所有权利。
Following wear testing in a hip simulator, the bearing surfaces of 36 mm metal on metal total hip replacements showed the formation of tribochemical layers. These layers were investigated in a transmission electron microscope, and analysis was performed using electron energy loss spectroscopy, energy dispersive x-rays and selected area electron diffraction. The tribofilm formed at the edge of the wear scar was 100 s of nanometres thick and contained cobalt sulphide particles embedded within. The film itself was rich in carbon, and appeared to contain no long range graphitic ordering when analysed with electron energy loss spectroscopy, and the spectra gathered from the tribofilm closely resembled those collected from amorphous carbon. The location at which the most substantial tribological layers formed may be explained by the formation of a blunt wedge at the edge of the wear scar following conformal changes to the bearing surfaces. (C) 2013 Elsevier Ltd. All rights reserved.