The Analysis of Growth Characteristic of Alumina Coatings by Micro-Plasma Oxidation
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Abstract:
In this paper, alumina ceramic coating of aluminum alloy surface was performed using micro-plasma oxidation (MPO) technology. Coating formed after short treatment time was found to consist of -Al2O3 and -Al2O3. Single -Al2O3 coatings can be gained by oxidation for 2.5 h. The growth velocity of coating thickness was 0.7 m/min during first 135 min, then that was constant. The surface density of coating was only 0.088 mg/cm2 at 15th min, then that increases gradually. The surface density increase presented a linear relationship during 15 min~60 min, and after 60 min the increase of surface density of coating is slow.
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[Xin Shigang, Jiang Zhaohua, Wu Xiaohong, Sun Xuetong, Zhao Liancheng. The Analysis of Growth Characteristic of Alumina Coatings by Micro-Plasma Oxidation[J]. Rare Metal Materials and Engineering,2004,33(6):651~654.] DOI:[doi]