Effects of grain size on coercivity of combined-reaction-processed FePd intermetallics

被引：34

作者：

Deshpande, AR ^{[1
]}

Xu, H ^{[1
]}

Wiezorek, JMK ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Mat Sci & Engn, Pittsburgh, PA 15261 USA

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 10期

基金：

美国国家科学基金会;

关键词：

magnetic age hardening; electron microscopy; coercivity mechanisms; grain size effect; L1(0) alloys; FePd ordered intermetallics; combined reaction transformation;

D O I：

10.1016/j.actamat.2004.02.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of the microstructure and the coercivity of cold-deformed ferromagnetic Fe-Pd intermetallics with equiatomic composition during isothermal annealing at 500 and 600 degreesC has been studied by X-ray diffraction, scanning and transmission electron microscopy and vibrating sample magnetometry. The deformation-processed alloys exhibit morphologically essentially equiaxed microstructures and up to about fivefold increased coercivity compared with conventionally processed bulk L1(0)-ordered FePd. An inverse linear relationship between the coercivity and the average grain size has been established, which for grain sizes in the range of about 0.4-1.0 mum has been attributed to a nucleation-type coercivity mechanism. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2903 / 2911

页数：9

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