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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 2    April 2007

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Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy
induced by external magnetic field
ZHEN Liang(甄 良)1, SUN Xue-yin(孙学银)1, XU Cheng-yan(徐成彦)1, 2,
GAO Run-sheng(高润生)1, XU Ren-gen(徐仁根)1, QIN Lu-chang(秦禄昌)2, 3

1. School of Materials Science and Engineering, Harbin Institute of Technology,
Harbin 150001, China;
2. Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill,
NC 27599-3255, USA;
3. Curriculum in Applied and Materials Sciences, University of North Carolina at Chapel Hill,
Chapel Hill, NC 27599-3255, USA

Abstract:Structural and magnetic properties of Fe-25Cr-12Co-1Si alloy thermo-magnetically treated under different external magnetic field conditions were investigated. Orientation and morphology of the ferromagnetic α1 phase embedded in α2 phase matrix before and after step ageing are characterized by transmission electron microscope(TEM). The results show that the ellipsoidal particles of ferromagnetic α1 phase are aligned along the direction of external magnetic field during isothermal magnetic ageing. Approximately 28% of the total coercivity can be attributed to the shape anisotropy of α1 phase particles induced by external magnetic field for Fe-25Cr-12Co-1Si alloy thermo-magnetically treated with a parallel magnetic field.

 

Key words: Fe-Cr-Co alloy; magnetic anisotropy; microstructure; magnetic properties

ISSN 1672-7029
CN 43-1423/U

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