Enhanced coercivity of Nd-Ce-Fe-B sintered magnets by adding (Nd, Pr)-H powders

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	Enhanced coercivity of Nd-Ce-Fe-B sintered magnets by adding (Nd, Pr)-H powders
	Ma, Tianyu; Wu, Bo; Zhang, Yujing; Jin, Jiaying; Wu, Kaiyun; Tao, Shan; Xia, Weixing; Yan, Mi
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2017
卷号	721 页码:42742
ISSN号	0925-8388
英文摘要	Incorporating the highly abundant rare earth (RE) Ce into Nd-Fe-B sintered magnets has attracted considerable interest recently. The inferior anisotropic field (HA) of Ce2Fe14B to Nd2Fe14B, however leads to low coercivity of the Nd-Ce-Fe-B magnets. To further enhance the coercivity, in this work, (Nd, Pr)-H powders were used as intergranular additive to restructure the grain boundaries of the low cost (Nd,Pr)(22.3)Ces(8).24FebaiBi (wt.%) sintered magnets. When added with only 2 wt% (Nd, Pr)-H, the Hcj can be enhanced from 10.6 kOe to 12.7 kOe with slight reduction in remanence and maximum energy product. The dehydrogenation of (Nd, Pr)-H during sintering promotes the diffusion of Nd and Pr towards the 2:14:1 phase grains and the smoothing of grain boundaries. The formation of (Nd, Pr)-rich shell with locally enhanced magnetocrystalline anisotropy and the magnetic isolation between adjacent 2:14:1 phase grains result in obvious coercivity enhancement, which was supported by magnetic domain structure characterizations and micromagnetic simulations. It suggests that through grain boundary restructuring, the coercivity of Nd-Ce-Fe-B magnets can be enhanced to be comparable of commercial Nd-Fe-B magnets, which may shed new insights into the fabrication of low cost RE permanent magnets. (C) 2017 Elsevier B.V. All rights reserved.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13575]
专题	2017专题
推荐引用方式 GB/T 7714	Ma, Tianyu,Wu, Bo,Zhang, Yujing,et al. Enhanced coercivity of Nd-Ce-Fe-B sintered magnets by adding (Nd, Pr)-H powders[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,721:42742.
APA	Ma, Tianyu.,Wu, Bo.,Zhang, Yujing.,Jin, Jiaying.,Wu, Kaiyun.,...&Yan, Mi.(2017).Enhanced coercivity of Nd-Ce-Fe-B sintered magnets by adding (Nd, Pr)-H powders.JOURNAL OF ALLOYS AND COMPOUNDS,721,42742.
MLA	Ma, Tianyu,et al."Enhanced coercivity of Nd-Ce-Fe-B sintered magnets by adding (Nd, Pr)-H powders".JOURNAL OF ALLOYS AND COMPOUNDS 721(2017):42742.