Effect of Ce content on the magnetic properties and microstructure of sintered Nd-Ce-Fe-B magnets after Pr70Cu30 alloy diffusion
Effect of Ce content on the magnetic properties and microstructure of sintered Nd-Ce-Fe-B magnets after Pr70Cu30 alloy diffusion
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Ce含量对Pr70Cu30合金扩散后烧结Nd-Ce-Fe-B磁体磁性能和显微组织的影响
DOI:
10.1016/j.jallcom.2022.165661
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发表时间:
2022-05
影响因子:
6.2
通讯作者:
Wenqiang Zhao
中科院分区:
文献类型:
--
作者:
Fugang Chen;Hechang Han;Tieqiao Zhang;Yong Zhao;Xiaoli Wang;Wenqiang Zhao
Grain boundary diffusion process (GBDP) with Pr70Cu30alloy was performed on sintered Nd-Ce-Fe-B magnets with different Ce contents (0 wt%, 5 wt%, 10 wt% and 15 wt%). The coercivities of the original magnets were 1053 kA/m (Ce: 0 wt%), 912 kA/m (Ce: 5 wt%), 915 kA/m (Ce: 10 wt%) and 732 kA/m (Ce: 15 wt%). After GBDP the coercivities were 1390 kA/m (Ce: 0 wt%), 1074 kA/m (Ce: 5 wt%), 937 kA/m (Ce: 10 wt%) and 849 kA/m (Ce: 15 wt%). Compared with the original magnets the coercivity increments were 337 kA/m (32%), 162 kA/m (17.8%), 22 kA/m (2.4%) and 117 kA/m (16%) for the magnets with Ce contents of 0 wt%, 5 wt%, 10 wt% and 15 wt%, respectively after GBDP. The Ce substitution for Nd/Pr promotes the diffusion process while the coercivity increment decreases due to the formation of abnormal coarse grains near the magnet surface. After GBDP the remanence increments were −0.01 T, 0.02 T, 0.04 T, 0.05 T for the Ce0, Ce5, Ce10 and Ce15 magnets, respectively. The improved remanence of the Nd-Ce-Fe-B magnets was attributed to the formation of Pr-rich grains near the magnet surface and the Pr-rich shells in the grain boundaries of the inner grains. The finding in this work reveals that for sintered Nd-Ce-Fe-B magnets the effect of GBDP is sensitive to the Ce content.
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影响因子:
6.2
作者:
Sumin Kim;H. Lee;W. Nam;Donghwan Kim;W. Shin;J. Roh;Wooyoung Lee
通讯作者:
Sumin Kim;H. Lee;W. Nam;Donghwan Kim;W. Shin;J. Roh;Wooyoung Lee
DOI:
10.2139/ssrn.3697716
发表时间:
2020-10
期刊:
Materials Engineering eJournal
影响因子:
--
作者:
D. Billington;H. Okazaki;K. Toyoki;Y. Kotani;Y. Takada;Takashi Sato;Y. Kaneko;A. Kato;T. Sasaki;T. Ohkubo;K. Hono;Tetsuya Nakamura
通讯作者:
D. Billington;H. Okazaki;K. Toyoki;Y. Kotani;Y. Takada;Takashi Sato;Y. Kaneko;A. Kato;T. Sasaki;T. Ohkubo;K. Hono;Tetsuya Nakamura
影响因子:
9.4
作者:
Zhang, Yujing;Ma, Tianyu;Yan, Mi
通讯作者:
Yan, Mi
影响因子:
6.2
作者:
Huang, Min;Qiu, Zhiqiang;Zhang, Jian
通讯作者:
Zhang, Jian
影响因子:
1.5
作者:
M. Sagawa;S. Hirosawa;Hitoshi Yamamoto;S. Fujimura;Y. Matsuura
通讯作者:
M. Sagawa;S. Hirosawa;Hitoshi Yamamoto;S. Fujimura;Y. Matsuura