The Composition and Hardness of the Coating Containing Zirconia Produced by Micro-Arc Oxidation on Aluminium Alloy

摘要：

　　In this paper,a ceramic coating containing zirconia was produced by micro-arc oxidation (MAO) in a solution of K2ZrF6 and KOH.The composition and structure of the coating were investigated by XRD,EPMA.The results show that the coating consists of t-ZrO2,m-ZrO2,α-Al2O3 and γ-Al2O3.t-ZrO2 and m-ZrO2 distribute in outer layer of the coating,however,α-Al2O3 appears in inner layer of the coating.The coating surface consists of many micro-powders with a size of 1-2μm.It is because K2ZrF6 is unstable in the alkaline solution,and it can form zirconium hydroxide and takes part in the formation of the coating.The result of the hardness shows that the maximum hardness (1900HV) appears at around 30-50μm from the interface of substrate/coating.

关键词： Micro-arc oxidation Zirconia Coating Aluminium alloy

作者: XIN ShiGang LE Jun SONG LiXin

作者单位: The key library of Inorganic coatings,Shanghai Institute of Ceramic,Chinese Academy of Sciences,Shanghai 200050,Peoples Republic of China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 1082-1088

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）