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Journal of Inorganic Materials

Journal of Inorganic Materials >

2006 , Vol. 21 >Issue 2: 493 - 498

DOI: https://doi.org/10.3724/SP.J.1077.2006.00493

Research Paper

Microstructure and Adhesion Strength of Al-Si-O \\Micro-arc Oxidation Coating

  • XIN Shi-Gang ,
  • SONG Li-Xin ,
  • ZHAO Rong-Gen ,
  • HU Xing-Fang
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  • Research and Development Center of Special Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received date: 2005-04-11

  Revised date: 2005-06-16

  Online published: 2006-03-20

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Abstract

A complex Al-Si-O ceramic coating was deposited on aluminium alloy by micro-arc oxidation (MAO). The composition and structure were analyzed by XRD and SEM, and the adhesion strength of the coating to substrate was investigated by thermal impact, mechanical impact and tensile tests. The results show that the coating
consists of a mixture of α-Al2O3, γ-Al2O3 and mullite. The coating surface is rough with anumber of the plasma discharge products. The coating can suffer mechanical impact and thermal impact of 600℃, it indicates that the coating possesses of good ductibility, thermal shock resistant and adhesion strength to the substrate. The tensile test shows that the adhesion strength of the coating to substrate is higher than 20MPa.

Key words： aluminium alloy; micro-arc oxidation; ceramic coating; adhesion strength

Cite this article

XIN Shi-Gang , SONG Li-Xin , ZHAO Rong-Gen , HU Xing-Fang . Microstructure and Adhesion Strength of Al-Si-O \\Micro-arc Oxidation Coating[J]. Journal of Inorganic Materials, 2006 , 21(2) : 493 -498 . DOI: 10.3724/SP.J.1077.2006.00493

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