磁控溅射法制备CoCrMo合金表面掺杂DLC膜层的性能研究（英文）

Performance of CoCrMo Alloy with Me-Doped DLC Coatings Prepared by a Magnetron Sputtering Method

为提高CoCrM合金的耐磨性,延长其使用寿命,采用磁控溅射法在其表面制备了厚度为1.89μm、分别掺W元素和掺Ti元素的2种DLC膜层。摩擦磨损实验测得未镀膜层、镀Ti-DLC膜层以及镀W-DLC膜层的CoCrMo合金的磨损率分别是15.25×10^(-6),0.76×10^(-6)和0.19×10^(-6)mm^3·m^(-1)·N^(-1)。结果说明:镀膜后基体的耐磨性显著提高;镀W-DLC的试样比镀Ti-DLC的试样更耐摩。拉曼分析表明,镀膜试样因在摩擦过程中表层膜层发生了部分石墨化,所以表现出了优异的耐磨性。

To enhance the wear resistance of CoCrMo alloy used as hip joints for longer service time, the W-DLC （W doped-diamond like carbon） films and Ti-DLC （Ti doped-diamond like carbon） films were prepared by a DC magnetron sputtering method combined with ion source technique. The thickness of the as-prepared films was 1.89 μm. Results show that the coated CoCrMo alloy exhibits higher wear resistance in comparison with uncoated CoCrMo one, and the friction properties of W-DLC coated CoCrMo alloy are better than those of Ti-DLC coated CoCrMo alloy. The wear rates of uncoated CoCrMo, Ti-DLC coated CoCrMo and W-DLC coated CoCrMo are 15.25× 10^-6, 0.76× 10^-6, and 0.19× 106 mm3·m^-1·N^-1, respectively. Raman spectrum analysis shows that the excellent wear resistance of coated CoCrMo alloys is attributed to the graphitization of the top layer of DLC films during rubbing.