Effect of Ce on the Magnetic Properties and Microstructure of Sintered Didymium-Fe-B Magnets
Effect of Ce on the Magnetic Properties and Microstructure of Sintered Didymium-Fe-B Magnets
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DOI：
10.1109/tmag.2014.2322823
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发表时间：
2014-10-01
影响因子：
2.1
通讯作者：
Yan, Aru
中科院分区：
文献类型：
--
作者：
Yan, Changjiang;Guo, Shuai;Yan, Aru
本文研究了用Ce取代镨钕合金对烧结永磁体组织和磁性能的影响。一系列（Di(1-x) Ce-x）（27.5）Dy3Al0.1Cu0.1Febal。采用粉末冶金工艺制备了B1 （x = 0-0.56）磁体。结果表明，用Ce取代Di后，材料的基本磁性能，如剩余物和能积等都变差了。总的来说，随着Ce含量的增加，矫顽力减小，而当x = 0.24时，矫顽力突然增大。显微组织观察和物相分析表明，当x >= 0.24时，磁体的晶界变厚，这是由于CeFe2相的形成。
In this paper, the influence of the substitution of didymium (Pr-Nd alloy, abbreviated to Di) with Ce on the microstructure and magnetic properties of sintered permanent magnet was investigated. A series of (Di(1-x) Ce-x)(27.5)Dy3Al0.1Cu0.1Febal.B1 (x = 0-0.56) magnets were fabricated by powder metallurgy route. The results indicated that essential magnetic properties, such as remanence and energy product, deteriorated by substituting Di with Ce. In general, the coercivity decreased with the increase of the content of Ce, whereas there was a sudden increase of coercivity when x = 0.24. Microstructural observations and phase analyses illustrated that grain boundary layers were thickened in magnets with x >= 0.24, which was attributed to the formation of CeFe2 phase.