| 铝合金表面纳米化--微弧氧化复合涂层摩擦行为 |
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| 引用本文： | 文磊,王亚明,金莹.铝合金表面纳米化--微弧氧化复合涂层摩擦行为[J].北京科技大学学报,2015(10):1350-1357. |
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| 作者姓名： | 文磊 王亚明 金莹 |
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| 作者单位： | 1. 北京科技大学国家材料服役安全科学中心,北京,100083;2. 哈尔滨工业大学特种陶瓷研究所,哈尔滨,150080 |
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| 基金项目： | 国家自然科学基金资助项目，教育部博士点科研基金资助项目，高等学校学科创新引智计划资助项目 |
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| 摘 要： | 通过表面机械研磨处理在LY12CZ铝合金表面制备表面纳米化( SNC)过渡层，再采用微弧氧化( MAO)技术对纳米晶过渡层进行微结构重构，设计制备出纳米化-微弧氧化( SNC-MAO)复合涂层，并对比研究了铝合金表面微弧氧化涂层及纳米化-微弧氧化复合涂层的摩擦学行为。与微弧氧化涂层相比，纳米化-微弧氧化复合涂层因硬度较高而具有较好的耐磨性。微弧氧化涂层及纳米化-微弧氧化复合涂层与GCr15钢球对磨时具有相同的磨损机理，为对磨钢球向涂层的材料转移和氧化磨损。
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| 关 键 词： | 铝合金 复合涂层 摩擦学 纳米化 表面机械研磨处理 微弧氧化 |
Tribological behavior of SNC-MAO composite coatings formed on the surface of aluminum alloys |
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| Abstract: | A duplex process was designed to modify the surface of LY12CZ aluminum alloy by using surface mechanical attrition treatment ( SMAT) prior to microarc oxidation ( MAO) . A surface nanocrystalline ( SNC) layer was formed on the alloy surface by SMAT, a ceramic outer layer grew on the SNC layer by MAO, and finally an SNC-MAO composite coating was fabricated. The tribo-logical behaviors of the MAO coating and SNC-MAO composite coating were comparatively evaluated. Experimental results showed that the SNC-MAO composite coating had a better wear resistance than the MAO coating in the same test condition due to a higher hardness of the ceramic coating. The wear mechanism of the MAO coating and SNC-MAO composite coating involved materials transfer from the steel ball to the coating and oxidation wear. |
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| Keywords: | aluminum alloys composite coatings tribology nanocrystallization surface mechanical attrition treatment microarc oxidation |
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