Coercivity Enhancement in Nd2Fe14B Permanent Magnetic Powders through Rotating Diffusion Process with DyHx Powders

被引：8

作者：

Choi, Moonhee ^{[1
]}

Yu, Jihun ^{[2
]}

Kim, Donghwan ^{[2
]}

Kim, Inbae ^{[1
]}

Kim, Yangdo ^{[1
]}

机构：

[1] Pusan Natl Univ, Energy Mat Lab, Sch Mat Sci & Engn, Pusan 609735, South Korea

[2] Korea Inst Mat Sci, Funct Mat Powder Technol Grp, Gyeongnam 641831, South Korea

来源：

JOURNAL OF MAGNETICS | 2011年 / 16卷 / 04期

关键词：

Nd2Fe14B; permanent magnet; diffusion process;

D O I：

10.4283/JMAG.2011.16.4.342

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nd2Fe14B permanent magnetic powders (H-i(c) = 9.2 kOe, B-r = 12.2 kG) were produced by HDDR process. Their coercivity was enhanced to 12.6 kOe through the grain boundary diffusion process with dysprosium hydride (DyHx). DyHx diffusion process was optimized through rotating diffusion process, resulting in distinct phases rich in Nd and Dy observable by field emission scanning microscopy and transmission electron microscopy. The mechanism of coercivity enhancement that resulted in restrain the coupling effect between Nd2Fe14B grains is also discussed.

引用

页码：342 / 349

页数：8

共 13 条

[1] Choi M, 2011, REV ADV MATER SCI, V28, P134
[2] Cullity B. D., 2003, MAGNETIC MAT, P542
[3] Kronmtiller Helmut, 2007, HDB MAGNETISM ADV MA, P1027
[4] Kronmtiller Helmut, 2007, HDB MAGNETISM ADV MA, P1028
[5] Kronmuller Helmut, 2007, HDB MAGNETISM ADV MA, P1946
[6] Kronmuller Helmut, 2007, HDB MAGNETISM ADV MA, P1958
[7] The use of metal hydride powder blending in the production of NdFeB-type magnets
Mottram, RS
Davis, B
Yartys, VA
Harris, IR
[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2001, 26 (05) : 441 - 448
[8] Coercivity enhancement of hydrogenation-disproportionation-desorption-recombination processed Nd-Fe-B powders by the diffusion of Nd-Cu eutectic alloys
Sepehri-Amin, H.
Ohkubo, T.
Nishiuchi, T.
Hirosawa, S.
Hono, K.
[J]. SCRIPTA MATERIALIA, 2010, 63 (11) : 1124 - 1127
[9] Sujeung J., 2002, SUPER PERMANENT MAGN, P237
[10] Sujeung J., 2002, SUPER PERMANENT MAGN, P353

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