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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 713-715Study on Surface Modification Coating on...

Study on Surface Modification Coating on High-Purity Mg

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Abstract:

Microarc oxidation (MAO) surface modification course on high-purity Mg at constant DC and the resultant ceramic coatings were investigated. MAO was the course in which the pre-existing film/coating was modified or substituted and strengthened repeatedly. SEM disclosed the inhomogeneous formation rate of ceramic coating in different micro-regions at anode surface during MAO. Three-stage behavior of MAO including pre-microarc discharge stage, transitional stage and then further modifying stage was put forward. The latter two stages proceeded under continuous discharge conditions, accompanied by intensive evolution of gas. EDS analyses indicated that the resultants of MAO consisted mainly of Mg, O and Si elements. XRD analyses revealed the dependence of phase composition on treatment time and coating layer depth.

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Periodical:

Applied Mechanics and Materials (Volumes 713-715)

Pages:

2880-2888

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.713-715.2880

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Online since:

January 2015

Authors:

Yong Jun Zhang*, Cui Ling Zhao, Sheng Tao, Shu Gong Jia, Zheng Chun Liu

Keywords:

Ceramic Coating, Mg, Microarc Oxidation, SEM, Surface Modification, XRD

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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