Microstructures and Composition of Ceramic Coatings on Aluminum Produced by Micro-Arc Oxidation
来源期刊：材料保护2004年增刊第2期
论文作者：SHEN De-jiu WANG Yu-lin XING Guang-zhong Gu Wei-Chao
关键词：micro-arc oxidation; aluminum; ceramic coatings; microstructures;
摘 要：Microstructures and phase composition of the ceramic coatings formed on pure aluminum by heteropolar pulsed current ceramic synthesizing system for different periods were investigated by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). Results show that the amount of the discharge channels in the ceramic coating sminish while the aperture largen in the micro-arc oxidation process, and the surface of the ceramic coatingmelted and solidified in the process.XRD studies of ceramic coatings deposited for different time show that these coatings consist mainly of α-Al2 O3, γ-Al2 O3 , θ-Al2 O3 and a little amorphous phase, and phase composition of compact and porous ceramic coatings don' t have much difference but have a little change of the content of α-Al2 O3 and amorphous phase.
SHEN De-jiu1，WANG Yu-lin1，XING Guang-zhong1，Gu Wei-Chao1
(1.Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, P. R. China)
摘要:Microstructures and phase composition of the ceramic coatings formed on pure aluminum by heteropolar pulsed current ceramic synthesizing system for different periods were investigated by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). Results show that the amount of the discharge channels in the ceramic coating sminish while the aperture largen in the micro-arc oxidation process, and the surface of the ceramic coatingmelted and solidified in the process.XRD studies of ceramic coatings deposited for different time show that these coatings consist mainly of α-Al2 O3, γ-Al2 O3 , θ-Al2 O3 and a little amorphous phase, and phase composition of compact and porous ceramic coatings don'' t have much difference but have a little change of the content of α-Al2 O3 and amorphous phase.
关键词:micro-arc oxidation; aluminum; ceramic coatings; microstructures;
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