(北京有色金属研究总院，北京 100088)
摘 要: 采用微弧氧化方法对医用钛合金表面进行改性，利用X射线衍射分析(XRD)、扫描电镜(SEM)对微弧氧化膜层的表面形貌和化学成分进行分析，通过小振幅往复摩擦磨损试验测量膜层的耐磨损性能。结果表明：钛合金经过微弧氧化表面处理后，所得膜层存在不同尺寸的放电微孔，氧化膜内层相对外层较为致密；膜层主要由大量金红石型TiO2相、非晶相SiO2及少量锐钛矿型TiO2相组成；与基体相比，微弧氧化膜层的初期摩擦因数从0.7降低至0.1，耐磨性提高。
关键字: 钛合金；医用钛合金；微弧氧化；磨损性能
coating on biomedical titanium alloy
（General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:The coating prepared by micro-arc oxidation (MAO) on biomedical titanium alloy was investigated. The surface morphology and chemical composition of MAO coating were analyzed by X-ray diffractometry and scanning electron microscopy (SEM). The anti-wear property of the coating was measured through small amplitude oscillatory reciprocating friction and wear test. The results show that the MAO coating has some micropores with different dimensions and the inner layer of the coating is denser compared with the outer layer. The composition of the coating comprises majority of rutile TiO2 and amorphous phase SiO2. A fraction of the composition is anatase TiO2. The preliminary friction coefficient of the coating decreases from 0.7 to 0.1. The micro-arc oxidation treatment improves the anti-wear property of the titanium alloy.
Key words: titanium alloy; biomedical titanium alloy; micro-arc oxidation; wear property
