微弧氧化WE43镁合金人工髋关节摩擦磨损行为研究

在硅酸钠体系中对WE43镁合金人工髋关节进行微弧氧化，采用扫描电镜（SEM）观察微弧氧化膜层表面微观形貌，进而进行摩擦磨损性能试验，探讨其磨损机制。结果表明，经微弧氧化后可得到生长均匀、致密的氧化层；微弧氧化膜层具有一定的减摩效果和抗循环疲劳的能力，抗磨效果良好；微弧氧化WE43镁合金在低中载荷下磨损机制为磨粒磨损，高载荷下为磨粒磨损与剥落磨损并存。

Friction and wear research of artificial hip joint with micro-arc oxidation WE43 magnesium alloy

We performed micro arc oxidation for artificial hip joints with WE43 magnesium alloy in sodium silicate system. We employed scanning electron microscopy (SEM) to observe the microstructure of micro arc oxidation coating and then conducted friction and wear test to investigate its wear mechanism.Results show that uniform and dense oxidation coating can be acquired after micro arc oxidation.The coating has a certain friction reduction and anti cyclic fatigue capabilities, so its anti wear effect is better.The wear mechanism of micro arc oxidation of WE43 magnesium alloy is only abrasive wear for light and medium loads. However,spalling wear and abrasive wear coexist for heavy loads.