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Densification Behavior and Microstructure Evolution of Laser Surface Melting Processed Silicon-Containing Micro Arc Oxidation Coating

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Abstract:

The present work investigated the effect of laser surface melting (LSM) process on micro arc oxidation (MAO) coating prepared in silicate electrolytes (Si-MAO) and aluminate electrolytes (Al-MAO). Plasma intensity of laser spots, element content and phase constituents of coatings were analyzed. During LSM remelting process, the formation of heat sources and micro molten pools on the surface of MAO coating were discussed. The results showed that the moderate plasma was formed more easily on the Si-MAO than Al-MAO coating, owing to the temperature threshold of melting oxide layer was decreased for silicon-containing MAO coating during LSM treatment. Besides, the Si-MAO coating of laser-treated had low porosity and smooth surface.

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Periodical:

Advanced Materials Research (Volumes 941-944)

Pages:

1650-1653

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.941-944.1650

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Online since:

June 2014

Authors:

Jie Yu, Shi Chun Di*, Yan Wang, Peng Xiang Lv, Jun Jie Yang

Keywords:

Laser Surface Melting, Micro Arc Oxidation, Microstructure, Surface

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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