In the study, the hydrogen‐free diamond‐like carbon (DLC) coating was deposited on the surface of the Co‐Cr‐Mo alloy. Pin‐on‐plate tribotests were performed for the DLC‐coated CoCrMo specimen against un‐doped CoCrMo alloy under bovine serum albumin (BSA), NaCl solution, and distilled water. Results showed that the average coefficient of friction (COF) of the mating system was 0.08 under NaCl and 0.07 under distilled water, respectively. However, the dynamic COF under BSA lubrication was prone to increasing with testing time, and the average COF got to 0.12. The wear morphology of the pin was covered by the carbon transfer layer without BSA lubrication, and the formation of the transfer layer was a dynamic evolution process as wear debris adhesion, continuous transferring, and delamination. Oppositely, the transfer layer was inhibited under BSA lubrication due to the adsorption of the protein layer on the contact interface.

中文翻译：

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水溶液下DLC涂层的摩擦学性能

在这项研究中，无氢类金刚石碳（DLC）涂层沉积在Co-Cr-Mo合金的表面上。在牛血清白蛋白（BSA），NaCl溶液和蒸馏水作用下，对未掺杂CoCrMo合金的DLC涂层CoCrMo试样进行了板对板摩擦试验。结果表明，交配体系的平均摩擦系数（COF）在NaCl下为0.08，在蒸馏水下为0.07。然而，BSA润滑下的动态COF倾向于随测试时间的增加而增加，平均COF达到0.12。销的磨损形态在没有BSA润滑的情况下被碳转移层覆盖，转移层的形成是动态发展过程，如磨损碎片粘附，连续转移和分层。相反，