{"title":"Structure and properties of ceramic coating on Al alloy by plasma microarc oxidation","authors":"Shu-tao Huang, Li Zhou","doi":"10.1109/MACE.2010.5535689","DOIUrl":null,"url":null,"abstract":"Microarc oxidation (MAO) coating on 7075 Al alloy were prepared in Na<inf>2</inf>SiO<inf>3</inf> electrolytes with and without Na<inf>2</inf>WO<inf>4</inf> addition. The effects of Na<inf>2</inf>WO<inf>4</inf> with different concentrations on the surface morphology, cross-sectional microstructure and micro-hardness of ceramic coatings have been studied by using SEM and micro-hardness tester, respectively. The results show that the microarc oxidation surface treatment can form a dense ceramic coating on 7075 Al alloy, which has good adhesion with Al alloy substrate. The concentration of Na<inf>2</inf>WO<inf>4</inf> solution has significant influence on the color, surface morphology, density and micro-hardness of ceramic coating, but has not much influence on the thickness of the ceramic coating. The addition of Na<inf>2</inf>WO<inf>4</inf> into the base Na<inf>2</inf>SiO<inf>3</inf> electrolyte resulted in the increase of the microhardness of the ceramic coating.","PeriodicalId":6349,"journal":{"name":"2010 International Conference on Mechanic Automation and Control Engineering","volume":"54 1","pages":"3195-3198"},"PeriodicalIF":0.0000,"publicationDate":"2010-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 International Conference on Mechanic Automation and Control Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MACE.2010.5535689","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Microarc oxidation (MAO) coating on 7075 Al alloy were prepared in Na2SiO3 electrolytes with and without Na2WO4 addition. The effects of Na2WO4 with different concentrations on the surface morphology, cross-sectional microstructure and micro-hardness of ceramic coatings have been studied by using SEM and micro-hardness tester, respectively. The results show that the microarc oxidation surface treatment can form a dense ceramic coating on 7075 Al alloy, which has good adhesion with Al alloy substrate. The concentration of Na2WO4 solution has significant influence on the color, surface morphology, density and micro-hardness of ceramic coating, but has not much influence on the thickness of the ceramic coating. The addition of Na2WO4 into the base Na2SiO3 electrolyte resulted in the increase of the microhardness of the ceramic coating.
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