MICROSTRUCTURE AND GROWTH PROCESS OFAl2O3FILM ON PURE ALUMINUM BY MICRO-ARC OXIDATION

Chuanzhong Chen (), Qing Dong, Diangang Wang and Qianmao Ji
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Chuanzhong Chen: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Qing Dong: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Diangang Wang: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Qianmao Ji: Shandong Information Technology College, Shandong Weifang 261041, P. R. China

Surface Review and Letters (SRL), 2005, vol. 12, issue 05n06, 781-785

Abstract: Ceramic coatings were formed on a pure aluminum substrate in an aqueous solution of phosphate salt, using the pulsating micro-arc oxidation method. XRD indicated that the film composed of pureγ-Al2O3. SEM showed that the surface of the film was micro-porous with 1–5 μm pores. EDS gave the element distributions of the cross-section. The result indicated that elements from the electrolyte likePcould be incorporated into the film during MAO process. The microhardness test showed that the film had an average hardness of 654 HV0.025. The growth process of theAl2O3ceramic-like film was discussed on the basis of the structure analysis.

Keywords: Micro-arc oxidation; phase component; morphology; aluminum (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1142/S0218625X05007670

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