Enhancement of coercivity of hot-deformed Nd-Fe-B anisotropic magnet by low-temperature grain boundary diffusion of Nd60Dy20Cu20 eutectic alloy
Enhancement of coercivity of hot-deformed Nd-Fe-B anisotropic magnet by low-temperature grain boundary diffusion of Nd60Dy20Cu20 eutectic alloy
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DOI：
10.1016/j.scriptamat.2013.07.011
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发表时间：
2013-11-01
影响因子：
6
通讯作者：
Hono, K.
中科院分区：
文献类型：
--
作者：
Sepehri-Amin, H.;Liu, J.;Hono, K.
通过使用 Nd60Dy20Cu20 近共晶合金的低温晶界扩散工艺，热变形 Nd-Fe-B 磁体的矫顽力从 1.6 T 提高到 2.6 T。在650℃的加工温度下，合金熔体通过晶界渗透到磁体中。扩散过程后，平行于c面的晶间相中铁磁元素的成分大幅减少，并且薄的富Dy壳包围了Nd2Fe14B相晶粒，这解释了矫顽力的大幅增强。 (C) 2013 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
The coercivity of a hot-deformed Nd-Fe-B magnet was enhanced from 1.6 to 2.6 T by a low-temperature grain boundary diffusion process using a Nd60Dy20Cu20 near-eutectic alloy. The alloy melt infiltrates into the magnet through grain boundaries at the processing temperature of 650 degrees C. The composition of ferromagnetic elements in the intergranular phase parallel to the c-planes decreases substantially and thin Dy-rich shell surrounds the Nd2Fe14B phase grains after the diffusion process, which explains the large enhancement in coercivity. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.