LY12铝合金微等离子体氧化陶瓷膜的相分布及显微硬度分析  

Phase Distribution and Microhardness Analysis of Ceramic Coatings Formed by Microplasma Oxidation on Aluminum Alloys

作　　者：薛文斌[1] 来永春[1] 邓志威 陈如意[1] 

机构地区：[1]北京师范大学低能核物理研究所

出　　处：《材料科学与工艺》1999年第2期18-21,共4页Materials Science and Technology

基　　金：国家"863"高科技计划!863-715-011-020;国家自然科学基金青年基金!59801003

摘　　要：使用Ｘ射线衍射仪和显微硬度计测定了ＬＹ１２铝合金微等离子体氧化陶瓷膜沿深度方向 的相分布及显微硬度变化曲线．结果表明，铝合金微等离子体氧化陶瓷膜主要由 α－Ａｌ_２Ｏ_３、γ－ Ａｌ_２Ｏ_３相组成，从表层到里层，α－Ａｌ_２Ｏ_３相含量逐渐增加．膜的显微硬度沿深度方向变化同 α－ Ａｌ_２Ｏ_３含量变化一致，致密层中显微硬度大于 ＨＶ１５００，极值点达到 ＨＶ２３００．The phase and microhardness distributions in ceramic coating formed by microplasma oxidation on LY12 aluminum alloy were investigated using X - ray diffractometer and microhardness tester. The results show that the ceramic coating contains mainly a - Al_2 O_3, y - A1_2 O_3 phases, and the a - A1_2 O_3 content gradually increases from outer layer to inner layer of coating. The change of microhardness in different depth of coatings is consistent to the change of a - A1_2O_3 content. The microhardness in compact layer is over 1500HV, and its maximum value can reach 2300HV.

关 键 词：微等离子体氧化 相分布 硬度 铝合金 陶瓷膜 

分 类 号：TG174.45[金属学及工艺—金属表面处理]