Effects of Electrical Parameters on the Microstructure of Microarc Oxidation Ceramic Coatings on Ti6Al4V Alloy

Abstract

Abstract: Ceramic oxide coatings were formed on Ti6Al4V alloy surface by Microarc Oxidation(MAO) in Na₂SiO₃-KOH-(NaPO₃)₆ solution using an AC power supply. The effects of voltage and
frequency of the power on growth kinetics, microstructure and phase constitute of the coatings were studied. The results show: with voltage
increasing or frequency decreasing, the growth rate of the coatings increases, but the surface morphology becomes coarser. The as-deposited
coatings are relatively dense and uniform, mainly composed of anatase and rutile TiO₂. The phase constitute in the coatings depends on electrical
parameters of voltage and frequency. With voltage increasing or frequency decreasing, the content of anatase TiO₂ decreases, while rutile TiO₂
increases and becomes the predominant phase.

Key words: titanium alloy, microarc oxidation, electrical parameters, microstructure

CLC Number:

TQ174

WANG Ya-Ming,JIANG Bai-Ling,LEI Ting-Quan,GUO Li-Xin,CAO Yue-Ping. Effects of Electrical Parameters on the Microstructure of Microarc Oxidation Ceramic Coatings on Ti6Al4V Alloy[J]. Journal of Inorganic Materials.

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Effects of Electrical Parameters on the Microstructure of Microarc Oxidation Ceramic Coatings on Ti6Al4V Alloy

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