Dysprosium-free melt-spun permanent magnets

被引：61

作者：

Brown, D. N. ^{[1
]}

Wu, Z. ^{[1
]}

He, F. ^{[1
]}

Miller, D. J. ^{[1
]}

Herchenroeder, J. W. ^{[1
]}

机构：

[1] Magnequench Technol Ctr, Singapore 117525, Singapore

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2014年 / 26卷 / 06期

关键词：

B SINTERED MAGNETS; COERCIVITY ENHANCEMENT; ND; FE; MICROSTRUCTURE; POWDERS;

D O I：

10.1088/0953-8984/26/6/064202

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Melt-spun NdFeB powders can be formed into a number of different types of permanent magnet for a variety of applications in electronics, automotive and clean technology industries. The melt-spinning process produces flake powder with a fine uniform array of nanoscale Nd2Fe14B grains. These powders can be net-shape formed into isotropic polymer-bonded magnets or hot formed into fully dense magnets. This paper discusses the influence of heavy rare earth elements and microstructure on the magnetic performance, thermal stability and material cost of NdFeB magnets. Evidence indicates that melt-spun nanocrystalline NdFeB magnets are less dependent on heavy rare earth elements for high-temperature performance than the alternative coarser-grained sintered NdFeB magnets. In particular, hot-pressed melt-spun magnets are an attractive low-cost solution for applications that require thermal stability up to 175-200 degrees C.

引用

页数：8

共 32 条

[1] Optimization of melt spun RE-Fe-B powder composition for fully dense, high energy magnets [J].