Sub-surface characterisation of tribological contact zone of metal hip prostheses
Sub-surface characterisation of tribological contact zone of metal hip prostheses
复制标题
金属髋关节假体摩擦接触区的次表面表征
DOI：
10.1088/1742-6596/644/1/012029
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Zeng P
中科院分区：
文献类型：
--
作者：
Zeng P
许多金属对金属接头失效与不利的局部组织反应有关，这是由于身体对从轴承表面或锥度界面释放的磨损碎片和腐蚀产物的反应。在CoCrMo金属接头上发现了碳质层和氧化膜，它们对材料的耐磨性起着重要的作用。然而，对碳质层和氧化膜的结构和分布却缺乏定量的资料。目前的工作对回收的CoCrMo锥度界面的表面损伤进行了详细的研究。此外，通过对标准机械抛光（MP）和电抛光（EP）表面进行往复测试后的比较，研究了生物医用CoCrMo的启动表面结构的系统性差异。特定位置的FIB/TEM截面显示了CoCrMo锥度界面和MP， EP CoCrMo上的碳质层和氧化膜的证据，根据位置的不同，范围在5-500 nm之间。无定形碳质层在EEL光谱中呈π*峰，含有微量的Ca和n，锥度界面上的氧化膜具有多孔结构，HRTEM显示在无定形背景下存在氧化铬纳米晶体，而在MP和EP CoCrMo上往复测试仅存在极薄的氧化膜（约2 nm）。
Many metal on metal joint failures have been associated with adverse local tissue reactions due to the response of the body to wear debris and corrosion products, released from the bearing surface or the taper interface. Both a carbonaceous layer and an oxide film are reported on the CoCrMo metal joints, which play important roles in the wear resistance of the material. However, there is a lack of quantitative data on the structure and distribution of the carbonaceous layer and the oxide film. The current work provides a detailed investigation of the surface damage on retrieved CoCrMo taper interfaces. In addition, systematic differences in the starting surface structure of biomedical CoCrMo were studied through a comparison of a standard mechanical polished (MP) and an electropolished (EP) surface after reciprocating test. Site-specific FIB/TEM cross-sections show the evidence of the carbonaceous layer and the oxide film on both CoCrMo taper interfaces and MP, EP CoCrMo, ranging from 5-500 nm depending on the location. The amorphous carbonaceous layer exhibits a π* peak in the EEL spectra, with trace of Ca and N. The oxide film on the taper interfaces has a porous texture and HRTEM indicates chromium oxide nano-crystals in an amorphous background, however, only a very thin oxide film (∼ 2 nm) exists on MP and EP CoCrMo after reciprocating test.
影响因子：
5
作者：
P. Zeng;A. Rana;R. Thompson;W. M. Rainforth
通讯作者：
P. Zeng;A. Rana;R. Thompson;W. M. Rainforth
影响因子：
168.9
作者：
Smith, Alison J.;Dieppe, Paul;Blom, Ashley W.
通讯作者：
Blom, Ashley W.
聚合物模块化全髋关节置换术中回收的大直径金属锥体界面上氧化膜的表征
影响因子：
6.2
作者：
Zeng P
通讯作者：
Zeng P