钴合金表面多层碳薄膜的制备及其性能研究

Growth and Biological Tribological Property of C/C Multilayers on Co-Cr-Mo Alloy Substrate

为了改善人工关节的生物摩擦学性能,采用磁过滤直流阴极真空弧源沉积技术在Co-Cr-Mo合金基体表面制备了多层C/C膜。采用拉曼光谱对薄膜的结构进行了表征;利用原子力显微镜观察了多层C/C膜的表面形貌;采用CSEM纳米硬度计测试了多层膜的纳米硬度;在销盘式摩擦磨损试验机上考察了多层膜的生物摩擦学性能。结果表明:多层C/C膜为典型的类金刚石结构,其表面光滑致密,硬度高达52 GPa,它与SiC球在磷酸盐缓冲溶液中的稳定摩擦系数仅为0.012,明显提高了人工关节用材料钴合金的生物摩擦学性能。

The C/C multi-layers were grown by filtered cathode vacuum arc deposition on the Co-Cr-Mo alloy substrate.The impacts of the deposition conditions on its microstructures and its biological tribological properties were characterized with Raman spectroscopy,atomic force microscopy（AFM） and conventional mechanical probes.The results show that the high density of sp2 and sp3 bonds exist in the fairly uniform,smooth,and compact C/C multi-layers with a hardness of 52 GPa,and that the C/C multi-layers significantly improve the biological tribological property of the Co-Cr-Mo alloy.In addition,the C/C multi-layers exhibit high wear resistance,but low friction coefficient,only 0.012 when sliding against SiC in a phosphate-buffered saline solution.