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利用微弧氧化技术,采用甘油磷酸钙和乙酸钙混合电解液体系,在Ti6A14V钛合金表面制备了富含Ca,P元素的多孔陶瓷膜,研究了微弧氧化陶瓷层的摩擦学性能。在25%小牛血清润滑条件下,与Si3N4陶瓷球的滑动摩擦实验结果显示,微弧氧化处理使磨损率降低了近一个数量级,表明微弧氧化膜层具有良好的耐磨损性能;与牛骨的微动摩擦实验结果显示,微弧氧化陶瓷层的摩擦系数高于Ti6A14V,而且位移振幅越大摩擦系数越高,说明微弧氧化处理能有效阻止植入假体与骨组织之间的微动。
The micro-arc oxidation technology was used to prepare the porous ceramic membrane containing Ca and P elements on the surface of Ti6A14V titanium alloy. The tribological properties of the micro-arc oxidation ceramic layer were studied. The results of sliding friction experiments with Si3N4 ceramic balls under 25% calf serum lubrication showed that the micro-arc oxidation treatment reduced the wear rate by nearly an order of magnitude, indicating that the micro-arc oxidation coating has good wear resistance; The experimental results of fretting friction of bone show that the friction coefficient of micro-arc oxidation ceramic layer is higher than that of Ti6A14V, and the larger the displacement amplitude is, the higher the friction coefficient is, indicating that micro-arc oxidation treatment can effectively prevent micro-oxidation between the implant prosthesis and bone tissue move.