电压参数对铝合金微弧氧化陶瓷层相组成的影响  

Effect of Voltage Parameters on Phase Constitution of Ceramic Coating Prepared by Micro-arc Oxidation on Aluminum Alloy

作　　者：郭锋[1] 刘荣明[1] 李鹏飞[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

出　　处：《金属热处理》2007年第10期38-40,共3页Heat Treatment of Metals

基　　金：内蒙古自然科学基金项目(200508010703)

摘　　要：通过XRD分析,研究了正向、负向电压对铝合金微弧氧化陶瓷层相组成的影响。结果表明,陶瓷层主要由-αA l2O3相、-γA l2O3相和mullite(莫来石)相组成,-αA l2O3相在陶瓷层内侧的质量分数高于外层,而mullite相的分布则相反。单独提高正向电压时,-αA l2O3相的质量分数先增后减;而单独提高负向电压时,-αA l2O3相的质量分数明显提高。-γA l2O3质量分数的变化与-αA l2O3相反。电压变化时,内侧的mullite相的质量分数变化不大,但外侧的质量分数随电压提高而增加。The effects of positive and negative voltage on phase constitution of ceramic coating on aluminum alloy prepared by micro-arc oxidation were studied by XRD analysis. The results show that the ceramic coating is mainly composed of α-Al2O3 ,γ-Al2O3 and mullite phases,α-Al2O3 phase is more inside than that of outside of the ceramic coating, but distribution of mullite phase is opposite, α-Al2O3 phase either inside or outsideof the coating,increases first and then decreases with increase of positive voltage,it increases only with increase of negative voltage, however, the changes of γ- Al2O3 phase is opposite to α-Al2O3 phase. Mullite phase inside of the coating is nearly unchanged while voltage changes, but it increases outside with voltage increasing.

关 键 词：铝合金 微弧氧化 陶瓷层 电压 相组成 

分 类 号：TG174.453[金属学及工艺—金属表面处理]