Preparation of high-performance PrFeB/α-Fe nanocomposite magnets by direct Joule heating

被引：7

作者：

Fukunaga, H. ^{[1
]}

Tagawa, A. ^{[1
]}

Nakano, M. ^{[1
]}

机构：

[1] Nagasaki Univ, Nagasaki 8528521, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

direct Joule heating; nanocomposite magnet; single-roller quenching method; coercivity;

D O I：

10.1016/j.jmmm.2003.12.1277

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rapidly-quenched Pr12Fe83B5 amorphous ribbons were annealed by a direct Joule heating method. Precipitation of Pr2Fe14B and alpha-Fe multi-phases resulted in a high coercivity of approximately 600 kA/m on average. This value was higher by approximately 200 kA/m than that of pulse-annealed nanocomposite magnets with an infrared furnace, which suggests that high performance nanocomposite magnets can be obtained by the Joule heating method. It was also clarified that the suppression of surface oxidation would achieve a further improvement in magnetic properties of the above-mentioned nanocomposite magnets. (C) 2003 Elsevier B. V. All rights reserved.

引用

页码：E1901 / E1903

页数：3

共 3 条

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Davies, HA
Betancourt, JI
Harland, CL
[J]. SCRIPTA MATERIALIA, 2001, 44 (8-9) : 1337 - 1340
[2] Improvement in coercivity by high-speed crystallization for PrFeB-based nanocomposite magnets
Fukunaga, H
Tokunaga, K
Song, JM
[J]. IEEE TRANSACTIONS ON MAGNETICS, 2002, 38 (05) : 2970 - 2972
[3] Effect of strength of intergrain exchange interaction on magnetic properties of nanocomposite magnets
Fukunaga, H
Kuma, J
Kanai, Y
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1999, 35 (05) : 3235 - 3240

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