| 摘要: |
| 对镁合金微弧氧化膜层的形成过程以及形成过程中的工艺影响因素做进一步的探讨，得出微弧氧化膜层的形成是一种亚单层生长模型，它是“成膜→击穿→熔化→烧结→再成膜……”的多次循环过程。并且微弧氧化先期形成的主要是致密层，疏松层则主要是在后期形成。还研究了成膜电压、电流、电解液体系等工艺参数与膜层生成的关系，发现电压越高，得到的膜层越厚，而电流在20A/dm2的电流密度下生成的薄膜具有较好的质量和性能，还发现在硅酸盐体系中形成的膜层在质量还是性能方面优于铝酸盐和磷酸盐体系中形成的膜层。 |
| 关键词: 镁合金 微弧氧化 膜层 模型 生长 |
| DOI： |
| 分类号: |
| 基金项目:广东省科技工业科技攻关项目 |
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| Discussion of Growth Process of Micro-arc Oxidation Film on Magnesium Alloys |
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CHEN Xian-ming,LUO Cheng-ping,LIU Jiang-wen,LI Wen-fang
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College of Mechanical Engineering, South China University of Technology, Guangzhou 510641 China
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| Abstract: |
| The growth process of micro-arc oxidation film on magnesium alloys and the influencing factors were discussed. It was indicated that the processbelongs to the submonolayer growth, the film is growing and forming by the end of a cyclic process “film formingòbreakdownòmeltingòsinteringòreforming……”. The film formed in the early stage is more compact than in the later stage. The loose layer is formed mainly in the later growth stage. The relations between the film-forming voltage, current, electrolyte system and film growth were studied as well. It was found that the higher the voltage, the greater the thickness of film, and the quality and property of the film are better when the current density is 20A/dm2 and the solution is silicate but not aluminate and phosphate. |
| Key words: magnesium alloy micro-arc oxidation film model growth |
