NANOSTRUCTURED ND-FE-B MAGNETS WITH ENHANCED REMANENCE

被引：49

作者：

WECKER, J ^{[1
]}

SCHNITZKE, K ^{[1
]}

CERVA, H ^{[1
]}

GROGGER, W ^{[1
]}

机构：

[1] GRAZ TECH UNIV,FORSCHUNGSINST ELEKTRONENMIKROSKOPIE,GRAZ,AUSTRIA

来源：

APPLIED PHYSICS LETTERS | 1995年 / 67卷 / 04期

关键词：

D O I：

10.1063/1.115170

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanostructured isotropic Nd-Fe-B magnets with enhanced remanence were produced by hot compaction of mechanically alloyed Nd-Fe-B powders at temperatures of about 600 degrees C. Phase formation occurred during hot pressing without significant grain growth. The microstructure is a two phase nanocomposite of hard magnetic Nd2Fe14B and soft magnetic alpha-Fe with an average grain size of about 20 nm. These small dimensions allow effective exchange interactions between hard and soft magnetic grains and result in an enhancement of the remanence by more than 30% above the Stoner-Wolfarth limit expected for noninteracting single domain particles. So far, the best results are a remanence of 1.0 T, an energy density of 121 kJ/m(3) and a coercivity of 4.2 kA/cm for a Nd-Fe-Co-Si-B magnet. (C) 1995 American Institute of Physics.

引用

页码：563 / 565

页数：3

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