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磷酸盐电解液体系下,利用微弧氧化技术在ZK60镁合金表面原位制备了耐磨性陶瓷膜,通过SEM、XRD、硬度计和摩擦磨损试验机,对不同电流密度下所制备的镁合金微弧氧化陶瓷膜的微观形貌、结构组成、显微硬度和摩擦系数等进行了研究。结果表明,微弧氧化膜主要由MgO组成;恒流模式下,随着电流密度升高,氧化陶瓷膜的表面的微孔数量减少,但孔径增大;表面显微硬度则呈先增大后减少趋势;当电流密度为12 A/dm~2时,在镁合金表面所获得的微弧氧化陶瓷膜具有较好的耐磨性。
Under the phosphate electrolyte system, the wear-resistant ceramic membrane was prepared in-situ on the surface of ZK60 magnesium alloy by micro-arc oxidation technology. The wear resistance of the magnesium alloy prepared by different current densities was studied by SEM, XRD, hardness tester and friction and wear tester. Micro-arc oxidation of the ceramic membrane morphology, structure, microhardness and friction coefficient were studied. The results show that the micro-arc oxidation film mainly consists of MgO. Under the constant current mode, with the increase of the current density, the number of micro-pores on the surface of the oxide ceramic film decreases but the pore diameter increases; the microhardness of the surface first increases Reduce the tendency; when the current density is 12 A / dm ~ 2, the micro-arc oxidation ceramic membrane obtained on the magnesium alloy surface has better wear resistance.