Coercivity enhancement of a Ce-based permanent magnet by grain boundary diffusion with Re70Cu30 (Re: Nd/Dy) eutectic alloys
Coercivity enhancement of a Ce-based permanent magnet by grain boundary diffusion with Re70Cu30 (Re: Nd/Dy) eutectic alloys
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Re70Cu30 (Re: Nd/Dy) 共晶合金晶界扩散增强 Ce 基永磁体的矫顽力
DOI：
10.1016/j.jallcom.2019.152965
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发表时间：
2020-04
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;Mengqi Cong;Hongmei Chen;Ning Liu;Dongpeng Wang;Xiaoli Wang;Yong Zhao;Wenqiang Zhao
分别采用Nd 70 Cu 30和Dy 70 Cu 30共晶合金对Ce基永磁体进行晶界扩散处理。尽管扩散源不同，但经过GBDP后的电导率增量（~ 200 kA/m，35%）几乎相同。Nd 70 Cu 30合金晶界双相永磁磁体的剩磁和矫顽力的热稳定性比Dy 70 Cu 30合金晶界双相永磁磁体的高得多。Nd 70 Cu 30合金经GBDP处理后的磁体中观察到连续的晶界相，而Dy 70 Cu 30合金经GBDP处理后的磁体中观察到不连续的晶界相。结果表明，Nd 70 Cu 30合金是提高Ce基永磁材料磁性能的理想扩散源。
Nd70Cu30and Dy70Cu30eutectic alloys have been used for the grain boundary diffusion process (GBDP) of a Ce-based permanent magnet, respectively. The coercivity increments (∼200 kA/m, 35%) are almost the same after GBDP in spite of the different diffusion sources. The thermal stabilities of remanence and coercivty of the magnet after GBDP with Nd70Cu30alloy are much higher than that of the magnet after GBDP with Dy70Cu30alloy. Continuous grain boundary phase was observed for the magnet after GBDP with Nd70Cu30alloy while the grain boundary phase was less continuous for the magnet after GBDP with Dy70Cu30alloy. The results indicate that Nd70Cu30alloy is a promising diffusion source to improve the magnetic properties of Ce-based permanent magnets.
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