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HomeSolid State PhenomenaSolid State Phenomena Vol. 279Robust Micro Arc Oxidation Coatings on 6061...

Robust Micro Arc Oxidation Coatings on 6061 Aluminum Alloys via Surface Thickening and Microvoid Reducing Approach

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Abstract:

The hardness and wear resistance of micro arc oxidation (MAO) ceramic coatings were influenced by phase compositions, surface thickness, porosity and microcracks. In this work, ceramic coatings with enhanced microhardness and friction resistance were fabricated on 6061 Al-alloy by increasing thickness and decreasing porosity through adding sodium hexametaphosphate ((NaPO₃)₆) as additive in silicate-based electrolyte. Surface morphologies and microhardness of the as-fabricated MAO coatings were evaluated using scanning electron microscope (SEM) and thickness meter. As a binary additive, the addition of (NaPO₃)₆ in electrolytes can obviously change the surface morphologies, thickness and microhardness of the resultant MAO coatings.

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Metallurgy Technology and Materials VI

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Periodical:

Solid State Phenomena (Volume 279)

Pages:

148-152

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.279.148

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Online since:

August 2018

Authors:

Qing Jun Zhu*, Bin Bin Wang, Xia Zhao, Bin Bin Zhang

Keywords:

Additive, Aluminum Alloy, Coating, Micro Arc Oxidation, Properties

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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