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以NaOH+Na2SiO3为基础电解液,分别加入Na2SiF6或NaF制备镁合金涂层。将AZ31B镁合金基体在200 V交流和260 V直流的混合电压下等离子体电解处理30 min。通过XRD和SEM方法分析陶瓷涂层的结构和形态。利用销盘式磨损实验和维氏硬度实验研究涂层的耐磨性和硬度。在Na2SiF6和NaF电解液中形成的涂层主要成分是MgO和Mg2SiO4。在Na2SiF6电解液中制备的涂层的显微硬度为HV1100,而在NaF电解液中制备的涂层的显微硬度约为HV900。结果表明:AZ31B镁合金的力学性能可以通过选择适当的电解液得到增强。
NaOH + Na2SiO3-based electrolyte, were added Na2SiF6 or NaF preparation of magnesium alloy coating. The AZ31B magnesium alloy substrate was plasma-electrolyzed for 30 min under a mixed voltage of 200 V AC and 260 V DC. The structure and morphology of ceramic coatings were analyzed by XRD and SEM. The wear resistance and hardness of the coating were investigated by pin-plate wear test and Vickers hardness test. The coatings formed in the Na2SiF6 and NaF electrolytes are mainly composed of MgO and Mg2SiO4. The coating prepared in the Na2SiF6 electrolyte had a HV1100 microhardness while the coating prepared in the NaF electrolyte had a microhardness of approximately HV900. The results show that the mechanical properties of AZ31B magnesium alloy can be enhanced by selecting the appropriate electrolyte.