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Wear resistance of ceramic coating on AZ91 magnesium alloy by micro-arc oxidation

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【Author】 ZHAO Hui,LIU Zheng,CHEN Li-jia CHEN Ji HAN Zhong College of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China; College of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110168, China; Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

【机构】 College of Materials Science and Engineering Shenyang University of Technology； Shenyang 110023； China； College of Materials Science and Engineering； Shenyang Ligong University； Shenyang 110168； Shenyang University of Technology； Institute of Metal Research； Chinese Academy of Sciences； Shenyang 110016；

【摘要】 <正>The ceramic coating formed on AZ91 magnesium alloy by micro-arc oxidation (MAO) was characterized. The results show that the ceramic coating(3.4-23μm in thickness)on the surface of AZ91 alloy was attained under different micro-arc oxidation treatment conditions, which consist mainly of MgO, Mg2SiO4 and MgSiO3 phases. Nano-hardness in a cross-sectional specimen was determined by nano-indentation experiment. The MAO coatings exhibit higher hardness than the substrate. Dry sliding wear tests for the MAO coatings and AZ91 alloy were also carried out using an oscillating friction and wear tester in a ball-on-disc contact configuration. The wear resistance of the MAO coatings is improved respectively under different treatment time as a result of different structures of ceramic coatings formed on AZ91 alloy.更多还原

【Abstract】 The ceramic coating formed on AZ91 magnesium alloy by micro-arc oxidation (MAO) was characterized. The results show that the ceramic coating(3.4-23μm in thickness)on the surface of AZ91 alloy was attained under different micro-arc oxidation treatment conditions, which consist mainly of MgO, Mg2SiO4 and MgSiO3 phases. Nano-hardness in a cross-sectional specimen was determined by nano-indentation experiment. The MAO coatings exhibit higher hardness than the substrate. Dry sliding wear tests for the MAO coatings and AZ91 alloy were also carried out using an oscillating friction and wear tester in a ball-on-disc contact configuration. The wear resistance of the MAO coatings is improved respectively under different treatment time as a result of different structures of ceramic coatings formed on AZ91 alloy.更多还原

【关键词】 AZ91 alloy； magnesium alloy； ceramic coating micro-arc oxidation； wear resistance；
【Key words】 AZ91 alloy； magnesium alloy； ceramic coating micro-arc oxidation； wear resistance；

【基金】 Project (5133001B) supported by the Ministry of Science and Technology of China;Project(1053125-1-09) supported by the Bureau of Science and Technology of Shenyang, China

【文献出处】 Transactions of Nonferrous Metals Society of China ,中国有色金属学会会刊(英文版) , 编辑部邮箱 ,2006年S3期

【分类号】TG174
【被引频次】2
【下载频次】67

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