Improved corrosion resistance and thermal stability of sintered Nd-Fe-B magnets with holmium substitution

查看全文 作　　者：Jinghui [1,2,3]Di;Shuai [1,2]Guo;Ling [1,2]Chen;Pengpeng [4]Yi;Guangfei [1,2]Ding;Kan [1,2]Chen;Ming [1,2]Li;Don [5]Lee;Aru [1,2]Yan

机构地区：[1]Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences,Ningbo 315201,China;[2]Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences,Ningbo 315201,China;[3]University of Chinese Academy of Sciences,Beijing 100049,China;[4]Ningbo Songke Magnetic Material Co., Ltd.,Ningbo 315517,China;[5]University of Dayton.OH 45469,USA

出　　处：《Journal of Rare Earths》索引2018年第36卷第8期,共6页

基　　金：Project supported by the Ningbo Major Technology Innovation Projects(2017B10005);Ningbo Natural Science Foundation(2015A610011);Guangxi Science and Technology Project(2016AD05041) 摘　　要：The effects of Ho substitution for Nd on the microstructure, corrosion resistance and thermal stability of the Nd-Fe-B magnets were investigated. The(Nd,Ho)-O phase was formed with increasing Ho substitution. The results of potentiodynamic polarization and highly accelerated stress test show improved corrosion resistance with increasing Ho substitution. The optimum mass loss 0.29 mg/cm^2 is achieved.Moreover, the average temperature coefficients for remanence and coercivity in the range of 25-150℃are both closer to zero, indicating improved thermal stability. The mechanisms for the improved corrosion resistance and thermal stability are discussed in relation to the microstructure featuring the(Nd,Ho)-O phase. 关键词：ND-FE-B 热稳定性腐蚀磁铁微观结构压力测试温度系数钬

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Improved corrosion resistance and thermal stability of sintered Nd-Fe-B magnets with holmium substitution

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