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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
【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-Al2O3、γ- Al2O3相组成,从表层到里层,α-Al2O3相含量逐渐增加.膜的显微硬度沿深度方向变化同 α- Al2O3含量变化一致,致密层中显微硬度大于 HV1500,极值点达到 HV2300.
【Abstract】 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 - Al2 O3, y - A12 O3 phases, and the a - A12 O3 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 - A12O3 content. The microhardness in compact layer is over 1500HV, and its maximum value can reach 2300HV.
【Key words】 microplasma oxidation; microarc oxidation; phase distribution; microhardness; aluminum alloys;
- 【文献出处】 材料科学与工艺 ,MATERIAL SCIENCE AND TECHNOLOGY , 编辑部邮箱 ,1999年02期
- 【分类号】TG174.45
- 【被引频次】41
- 【下载频次】337