摘要
采用微弧氧化技术在6061铝合金材料表面制备保护性涂层,通过试验,在铝酸盐体系电解液中,采用恒电流控制模式能够制备出厚度大于56μm的致密涂层.利用SEM和XRD测试微弧氧化涂层的显微组织和相结构,并测试了氧化涂层的显微硬度分布.结果表明,涂层成分主要含Al及O元素,由α-Al2O3,γ-Al2O3及少量的Al相组成;涂层的平均显微硬度为1317Hv0.1,比基体硬度提高了10倍.
In aluminate electrolyte systems,protective coatings（thickness56μm）were fabricated on 6061 aluminum alloy surface by micro-arc oxidation and constant current.The microstructure and phase structure of microarc oxidation coatings,together with its microhardness distribution,were investigated by SEM and XRD.The results showed that the coating was mainly composed of Al and O,with the phases ofγ-Al2O3,α-Al2O3,and Al formed.The hardness of ceramic oxide coatings with the value of 1317 Hv0.1was ten times higher than that of 6061 aluminum alloy.
出处
《材料研究与应用》
CAS
2014年第4期228-231,共4页
Materials Research and Application
基金
广州市对外合作项目(2012J5100045)
关键词
微弧氧化
铝合金
陶瓷涂层
显微组织和相结构
micro-arc oxidation
aluminum alloy
ceramic coatings
microstructure and phase structure
