电源频率对微弧氧化AZ91D镁合金陶瓷层性能的影响（英文）

发布时间：2019-06-09 21:15

【摘要】：选取不同的电源频率,用微弧氧化方法在AZ91D镁合金表面制备一系列陶瓷层,并分别采用扫描电子显微镜、电化学工作站和MS-T3000摩擦磨损试验仪对陶瓷层的形貌、厚度、耐腐蚀性和耐磨性能进行系统研究。结果表明,随着电源频率的增大,生成的陶瓷层变致密,厚度变薄。随着电流频率的增加,陶瓷层的耐腐蚀性明显提高,与陶瓷层的厚度的影响相似,不同电流频率下得到的陶瓷层的腐蚀电流的差值均变小。陶瓷层的摩擦因数随着电流频率的增大而减小,其耐磨性能由膜层厚度及其结构致密性共同决定。通过微弧氧化陶瓷层的生长机理对得到的结果进行分析。
[Abstract]:A series of ceramic layers were prepared on the surface of AZ91D magnesium alloy by micro-arc oxidation at different power supply frequencies. The morphology and thickness of the ceramic layer were measured by scanning electron microscope, electrochemical workstation and MS-T3000 friction and wear tester, respectively. Corrosion resistance and wear resistance were systematically studied. The results show that with the increase of power supply frequency, the ceramic layer becomes compact and the thickness becomes thinner. With the increase of current frequency, the corrosion resistance of ceramic layer increases obviously, which is similar to the influence of the thickness of ceramic layer, and the difference of corrosion current of ceramic layer obtained at different current frequencies becomes smaller. The friction coefficient of ceramic layer decreases with the increase of current frequency, and its wear resistance is determined by the thickness of the film and the tightness of its structure. The results were analyzed by the growth mechanism of micro-arc oxidation ceramic layer.
【作者单位】：中央民族大学理学院;中国科学院物理研究所;
【基金】：Project(11005151)supported by the Young Scientists Fund of the National Natural Science Foundation of China Project(YETP1297)supported by the Beijing Higher Education Young Elite Teacher Project,China Project(BEIJ2014110003)supported by the Undergraduate Research and Innovative Undertaking Program of Beijing,China
【分类号】：TG178

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