引用本文:张淑芬,张先锋,蒋百灵.镁合金微弧氧化陶瓷层形成及生长过程的研究[J].中国表面工程,2004,(1):35~38
.The Study on Mechanism of Formation and Growth of Ceramic Coating Prepared by Micro-arc Oxidation on Magnesium Alloy[J].China Surface Engineering,2004,(1):35~38
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镁合金微弧氧化陶瓷层形成及生长过程的研究
张淑芬,张先锋,蒋百灵
作者单位
摘要:
研究了MB8镁合金在硅酸盐溶液体系中微弧氧化陶瓷层形成及生长过程的形貌特征。结果表明：整个过程可分为3个阶段，即阳极沉积阶段、微弧阶段和局部弧光阶段。阳极沉积阶段是在阳极表面发生团絮氧化膜沉积与扩展的过程。微弧阶段是前期缺陷减少与消失并形成均匀膜层表面的过程，陶瓷层表面微孔孔径较小，膜层均匀致密。局部弧光阶段形成的放电微孔孔径较大，陶瓷层比较疏松。
关键词:  镁合金 微弧氧化 陶瓷层 生长机理
DOI：
分类号:TG146.2
基金项目:国家"十·五"科技攻关计划(2001BA311A06-3)
The Study on Mechanism of Formation and Growth of Ceramic Coating Prepared by Micro-arc Oxidation on Magnesium Alloy
CHANG Shu-fen  ZHANG Xian-feng  JIANG Bai-ling
Abstract:
SEM was employed to characterize the surface morphology evolution of coatings prepared by micro-arc oxidation on magnesium alloy in silicate solution. The possible growth mechanism of micro-arc oxidation coatings was proposed. The results showed that the coating grew by the following steps : the stage of anodic deposition, micro-arc oxidation and local arc light. In the stage of anodic deposition, the flocculent oxidation film deposits and extends on the surface of MB8 magnesium alloy. The next stage of micro-arc involved the decreasing and vanishing of flaw in the coatings, and the ceramic film was relatively uniform and dense, showing very small micro-pores. In the last stage of local arc light, the relative large holes appeared on the surface of coatings, therefore, the ceramic film became looser.
Key words:  magnesium alloy,micro-arc oxidation,ceramic coating,growth mechanism
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