无机材料学报

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铝基复合材料微弧氧化陶瓷膜的组成与性能

辛世刚, 宋力昕, 赵荣根, 胡行方   

  1. 中国科学院上海硅酸盐研究所特种无机材料研究发展中心, 上海 200050
  • 收稿日期:2004-12-28 修回日期:2005-03-14 出版日期:2006-01-20 网络出版日期:2006-01-20

Phase Composition and Properties of the Micro-arc Oxidation Coating on Aluminium Matrix Composite

XIN Shi-Gang, SONG Li-Xin, ZHAO Rong-Gen, HU Xing-Fang   

  1. Research and Development Center of Special Inorganic Material, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2004-12-28 Revised:2005-03-14 Published:2006-01-20 Online:2006-01-20

摘要: 微弧氧化是一种利用液相介质中阳极表面产生的等离子体放电合成氧化物陶瓷膜的技术. 本文利用微弧氧化技术在铝基复合材料表面制备了氧化铝陶瓷膜. XRD和SEM分析结果显
示, 陶瓷膜由α-Al2O3、γ-Al2O3和ε -Al2O3组成, 与基体结合效果好, 陶瓷膜表面存在大量类似火山口的等离子体放电产物, 说明陶瓷膜是
沿着放电通道生长. 陶瓷膜的最高硬度可达21GPa, 分布在距界面12μm附近; 恒电位极化实验结果显示, 经微弧氧化后的铝基复合材料拥有非常好的耐腐蚀性能.

关键词: 铝基复合材料, 微弧氧化, 氧化铝, 陶瓷膜

Abstract: Micro-arc oxidation (MAO) is a novel surface ceramic coating technique, based on a plasma discharge treatment in aqueous electrolyte on aluminium surface by using high polarized voltage. An alumina coating was produced
by MAO on aluminium matrix composite. The results of XRD and SEM show that the alumina coating consists of α-Al2O3, γ-Al2O3 and ε-Al2O3. The adhesion of the
coating to the substrate is fine. Many crater-mouth like products formed by the plasma discharge observed on the coatings surface, indicate that the plasma discharge products can be generated in the discharge
channels. The maximum hardness value detected at around 12μm from interface of substrate/coating is 21GPa. The potentiodynamic polarization analysis results of the coating indicate that the MAO coated
aluminium matrix composite possesses excellent corrosion resistance.

Key words: aluminium matrix composite, micro-arc oxidation, alumina, ceramic coating

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