Preparation of bulk Nd2Fe14B/Fe3B nanocomposite magnets with high rare earth content

被引：16

作者：

Zhang, W. Y. ^{[1
]}

Stoica, M. ^{[1
]}

Eckert, J. ^{[1
]}

Yu, P. ^{[2
]}

Jiang, J. Z. ^{[3
]}

机构：

[1] IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany

[2] Univ Queensland, Sch Engn, Div Mat, St Lucia, Qld 4072, Australia

[3] Zhejiang Univ, Lab New Struct Mat, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

INTERMETALLICS | 2008年 / 16卷 / 03期

关键词：

composites; magnetic intermetallics; magnetic properties; glasses; metallic; rapid solidification processing;

D O I：

10.1016/j.intermet.2007.09.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nd6Fe72-xCoxB22 (x = 0, 20) rods with 1 min diameter have been prepared by suction casting. The Nd6Fe72B22 rod is mainly composed of Nd2Fe23B3, Fe3B and a small amount of amorphous phase, whereas the Nd6Fe52Co20B22 sample is amorphous. Co addition considerably improves the glass-forming ability (GFA) of Nd6Fe72B22, which is believed to result from the large decrease of the eutectic temperature due to Co addition. Co addition promotes the formation of the Nd2Fe14B hard magnetic phase in annealed alloys, which strengthens the exchange coupling action among the magnetic phases and thus leads to a significant enhancement of the magnetic properties of the bulk nanocomposite magnets. For example, the remanence, coercivity, and energy product are increased from 3.9 kG, 1.3 kOe, and 0.9 MGOe for the Co-free alloy to 8 kG, 4.5 kOe, and 6 MGOe after Co addition, respectively. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：341 / 344

页数：4

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