Enhancement of coercivity of hot-deformed Nd-Fe-B anisotropic magnet by low-temperature grain boundary diffusion of Nd60Dy20Cu20 eutectic alloy

被引：117

作者：

Sepehri-Amin, H. ^{[1
,2
]}

Liu, J. ^{[1
,3
]}

Ohkubo, T. ^{[1
,2
]}

Hioki, K. ^{[4
]}

Hattori, A. ^{[4
]}

Hono, K. ^{[1
,2
,3
]}

机构：

[1] Natl Inst Mat Sci, Elements Strategy Initiat Ctr Magnet Mat, Tsukuba, Ibaraki 3050047, Japan

[2] Japan Sci & Technol Agcy, CREST, Tokyo, Japan

[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[4] Daido Steel Co Ltd, Daido Corp Res & Dev Ctr, Nagoya, Aichi 4578545, Japan

来源：

SCRIPTA MATERIALIA | 2013年 / 69卷 / 09期

关键词：

Permanet magnet; Nd-Fe-B; Coercivity; Diffusion process; UPSET NDFEB MAGNETS; SINTERED MAGNETS; MICROSTRUCTURE;

D O I：

10.1016/j.scriptamat.2013.07.011

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：647 / 650

页数：4

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