Low temperature diffusion process using rare earth-Cu eutectic alloys for hot-deformed Nd-Fe-B bulk magnets

被引：77

作者：

Akiya, T. ^{[1
]}

Liu, J. ^{[1
,2
]}

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

Ohkubo, T. ^{[1
]}

Hioki, K. ^{[3
]}

Hattori, A. ^{[3
]}

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

机构：

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

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058577, Japan

[3] Daido Steel Co LTD, Nagoya, Aichi 4578545, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 17期

关键词：

GRAIN-BOUNDARY DIFFUSION; COERCIVITY ENHANCEMENT; SINTERED MAGNETS; POWDERS;

D O I：

10.1063/1.4869062

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The low temperature grain boundary diffusion process using RE70Cu30 (RE = Pr, Nd) eutectic alloy powders was applied to sintered and hot-deformed Nd-Fe-B bulk magnets. Although only marginal coercivity increase was observed in sintered magnets, a substantial enhancement in coercivity was observed when the process was applied to hot-deformed anisotropic bulk magnets. Using Pr70Cu30 eutectic alloy as a diffusion source, the coercivity was enhanced from 1.65 T to 2.56 T. The hot-deformed sample expanded along c-axis direction only after the diffusion process as RE rich intergranular layers parallel to the broad surface of the Nd2Fe14B are thickened in the c-axis direction. (C) 2014 AIP Publishing LLC.

引用

页数：3

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