| 铸造镁合金微弧氧化机理 |
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| 引用本文： | 薛文斌,邓志威,张通和,陈如意,李永良.铸造镁合金微弧氧化机理[J].稀有金属材料与工程,1999,28(6):353-356. |
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| 作者姓名： | 薛文斌 邓志威 张通和 陈如意 李永良 |
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| 作者单位： | 北京师范大学,北京市辐射中心,北京,100875 |
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| 基金项目： | 国家“八六三”计划!863－715－011－020，国家自然科学基金!59801003 |
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| 摘 要： | 研究了ＺＭ５铸造镁合金微弧氧化过程中心膜生长规律和膜的相结构及形貌特征，并探讨了氧化膜生长机理。在初始一段时间内，氧化膜向外生长速度大于向内生长速度。氧化膜达到一定 度后，工件外部尺寸不再增加，而氧化膜完全转向基体内部生长。氧化膜具有表面疏松层和致密层２层结构，在ＮａＡｌ２Ｏ３溶液中氧化时，前者由ＭｇＯ和ＭｇＡｌ２Ｏ４相组成，后者主要由ＭｇＯ疏松层中富集来自溶液的铝元素。
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| 关 键 词： | 镁合金 微弧氧化 生长机理 铸造镁合金 |
| 修稿时间： | 19981212) |
Microarc Oxidation Mechanism of a Cast Magnesium Alloy |
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| Xue Wenbin,Deng Zhiwei,Zhang Tonghe,Chen Ruyi,Li Yongliang.Microarc Oxidation Mechanism of a Cast Magnesium Alloy[J].Rare Metal Materials and Engineering,1999,28(6):353-356. |
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| Authors: | Xue Wenbin Deng Zhiwei Zhang Tonghe Chen Ruyi Li Yongliang |
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| Abstract: | Growth regularity, phase structure and morphology of a ceramic film formed on the cast magnesium alloy'ZM5 during microarc oxidation have been studied, as well as the formation mechanism of the oxidation film. During the first stage of oxidation, thegrowth rate 0f film toward the external surface is higher than that toward the substrate. When an oxide film with a certain thicknessis formed, the oxide film grows toward the substrate, after which the sample thickness changes only slightly. The oxide film formedin a NaAlO2 solution consists of a loose layer and a compressed layer, and the former consisting of MgO and MgAl2O4 phases and thelatter mainly of the MgO phase. Furthermore, the resulting content of the loose layer is relatively high. |
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| Keywords: | magnesium alloy microarc oxidation growth mechanism |
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