类金刚石膜在水环境下的摩擦学行为

测试了 CoCrMo合金表面沉积类金刚石薄膜与CoCrMo在水溶液润滑下的摩擦磨损行为。结果表明：摩擦副在不同浓度牛血清白蛋白溶液润滑下的平均摩擦因数均在0.10左右，CoCrMo合金销磨损量最小值为1.69×10-5 mm3；相同条件下，生理盐水溶液润滑的磨损量为1.38×10-5 mm3，且销表面有转移膜生成；牛血清白蛋白溶液润滑时，界面蛋白吸附层屏蔽了转移膜的形成。根据结果可知，转移膜的形成经历了磨屑附着、连续转移、局部脱落的过程。

Tribological Behavior of DLC Films under Water Environment

Tribological behavior of the DLC films was analyzed systematically, which were deposited on the polished surfaces of CoCrMo alloy with respect to the CoCrMo under the lubrication of aqueous solution. Results show that the average friction coefficient is about 0.10 under bovine serum albumin (BSA) solution lubrication with different concentrations,and the smallest wear loss of CoCrMo pin is about 1.69×10-5 mm3. In the same conditions, the wear loss of CoCrMo pins under the lubrication of physiological saline solution is 1.38×10-5 mm3. The DLC transfer layer exists on the wear scar lubricated with physiological saline solution. It indicates that the formation of DLC transfer layer is inhibited by the adsorption of bovine serum albumin protein layer. The formation of transfer layer has undergone the processes of wear debris adhesion, continuous transferring, and partial delamination.