Electro-deposition and hydrothermal transition of alumina sol film on sintered NdFeB magnets

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• 作者：Rui Cao ; Liqun Zhu ; Huicong Liu ; Weiping Li ; ^{liweiping@buaa.edu.cn}
• 关键词：Alumina sol ; Electro-deposited sol film ; Hydrothermal treatment ; Corrosion resistance ; Irreversible magnetic losses
• 刊名：Surface and Coatings Technology
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：309
• 期：Complete
• 页码：820-828
• 全文大小：1778 K
• 卷排序：309

文摘

Alumina sol-gel film is prepared on NdFeB magnets by electro-deposition and hydrothermal methods. The alumina sol (AS) film improves the corrosion resistance and thermal stability of NdFeB. The kinetics features of alumina sol particles under electric field are investigated. The phase transition from alumina particle to boehmite layers on AS film are studied. The AS film is useful for the preparation of no magnetic loss protection film on NdFeB magnets.