Microstructure and soft magnetic properties of nanocrystalline Fe-Si powders

被引：109

作者：

Ding, J ^{[1
]}

Li, Y

Chen, LF

Deng, CR

Shi, Y

Chow, YS

Gang, TB

机构：

[1] Natl Univ Singapore, Dept Mat Sci, Singapore 117548, Singapore

[2] DSO Natl Labs, Singapore 118230, Singapore

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 314卷 / 1-2期

关键词：

transition metal alloys; mechanical alloying; nanostructures; magnetization;

D O I：

10.1016/S0925-8388(00)01234-2

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：

In this work, fine Fe-Si powders with a nanocrystalline structure were prepared by mechanical alloying (high-energy ball milling) and subsequent heat treatment (in order to optimize their magnetic properties). Good soft magnetic properties were obtained in mechanically alloyed Fe-Si powders. The Fe75Si25 powder annealed at 450 degreesC possessed a magnetization of 149 Am-2/kg and a coercivity of 0.2 kA/m. The coercivity model for soft magnetic nanocrystalline materials could be well applied to the Fe-Si powders in this work The mechanically alloyed Fe-Si possessed significantly higher magnetic permeability than that of commercially available Fe-Si powder, The permeability of the mechanically alloyed Fe75Si25 powder was comparable with that of mechanically alloyed pure Fe powder. Considering of lower density and better chemical stability of Fe-Si, the mechanically alloyed Fe-Si may be interesting for soft magnetic application including magnetic shielding and electromagnetic noise suppression. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：262 / 267

页数：6

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