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利用微弧氧化装置在硅酸盐体系中对ZM5镁合金进行了微弧氧化表面改性处理。采用XRD及SEM分析了ZM5镁合金微弧氧化陶瓷膜的形貌、组成和结构,并对微弧氧化陶瓷膜的硬度以及干式滑动摩擦磨损行为进行了研究。结果表明:微弧氧化膜由三层结构组成,主要由Mg2SiO4相和少量MgO相组成;可以显著提高镁合金基体的硬度和耐磨性,其室温滑动摩擦磨损机理为轻微犁削和粘附转移。
The micro-arc oxidation surface modification of ZM5 magnesium alloy was carried out in the silicate system by using micro-arc oxidation equipment. The morphology, composition and structure of MAO coatings on ZM5 magnesium alloy were analyzed by XRD and SEM. The hardness and the sliding friction and wear behavior of MAO coatings were also studied. The results show that the micro-arc oxidation film consists of three-layer structure, mainly composed of Mg2SiO4 phase and a small amount of MgO phase. It can significantly improve the hardness and wear resistance of the magnesium alloy matrix. The sliding frictional wear mechanism at room temperature is slight plowing and adhesion transfer .