中文摘要：

利用高温钝化处理方法,在Co-Cr-Mo合金表面得到钝化膜。标准摩擦试验考察了不同温度钝化试样在牛血清白蛋白溶液润滑下的摩擦学特性。表面轮廓仪、硬度测试仪、扫描电镜及X-射线衍射光谱仪分别表征了钝化膜的表面形貌、硬度及化学组成物质,并探讨了摩擦磨损机理。结果表明：钝化后试样表面均有尖晶石状Cr2O3晶体生长现象。钝化膜厚度及表面粗糙度、硬度均随钝化温度升高而增大。由于试样钝化后硬度增加,接触面间摩擦剪切力减小,从而引起摩擦系数值的降低。钝化试样表面耐磨性提高,其磨损形貌受到初始表面粗糙度及钝化膜与基材的结合力的综合影响。

英文摘要：

The surfaces of Co-Cr-Mo alloy were modified by high temperature passivation. The impact of the passivation temperature on the microstructures and mechanical properties of the Co-Cr-Mo alloy was investigated. The passivated alloy was characterized with X-ray diffraction,scanning electron microscopy,energy dispersive spectroscopy,and conventional mechanical probes. The tribological properties of the modified surfaces in bovine serum albumin solution were evaluated with standard tribometer. The results show that the passivation increased the hardness,roughness,and wear assistance,but decreased the friction coefficient of the modified Co-Cr-Mo alloy surfaces synthesized with spinal like Cr2O3 grains. As the passivation temperature rose up,the thickness,hardness and roughness of the passivated surfaces increased. The morphology of wear track depends strongly on the surface roughness and interface adhesion.