Huang Jinxia, Wang Liping, Liu Bin, Wan Shanhong, Xue Qunji
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou, 730000, P. R. China.
ACS Appl Mater Interfaces. 2015 Feb 4;7(4):2772-83. doi: 10.1021/am507850r. Epub 2015 Jan 22.
Complicated tribochemical reactions with the surrounding media often occur at the prosthesis material, which is a dominant factor causing the premature failure in revision surgery. Graphite-like carbon (GLC) film has been proven to be an excellent tribological adaption to water-based media, and this work focused on the friction and wear behavior of Mo-doped GLC (Mo-GLC)-coated poly(aryl ether ether ketone) sliding against Al2O3 counterpart in physiological saline, simulated body fluid, and fetal bovine serum (FBS), which mainly emphasized the interface interactions of the prosthetic materials/lubricant. Results showed different tribological responses of Mo-GLC/Al2O3 pairs strongly correlated with the interfacial reactions of the contacting area. Particularly, a transfer layer was believed to be responsible for the excellent wear reduction of Mo-GLC/Al2O3 pair in FBS medium, in which graphitic carbon and protein species were contained. The wear mechanisms are tentatively discussed according to the morphologies and chemical compositions of the worn surfaces examined by scanning electron microscope as well as X-ray photoelectron spectroscopy.
假体材料常常会与周围介质发生复杂的摩擦化学反应，这是导致翻修手术过早失败的一个主要因素。类石墨碳（GLC）薄膜已被证明对水基介质具有出色的摩擦学适应性，这项工作聚焦于在生理盐水、模拟体液和胎牛血清（FBS）中，掺钼GLC（Mo-GLC）涂层的聚芳醚醚酮与Al2O3配对物滑动时的摩擦和磨损行为，主要强调了假体材料/润滑剂的界面相互作用。结果表明，Mo-GLC/Al2O3配对物不同的摩擦学响应与接触区域的界面反应密切相关。特别地，据信在FBS介质中，Mo-GLC/Al2O3配对物出色的减磨效果归因于一个转移层，其中含有石墨碳和蛋白质成分。根据扫描电子显微镜以及X射线光电子能谱检查的磨损表面的形貌和化学成分，初步探讨了磨损机制。
