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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Influence of heat treatment on high frequency soft magnetic properties of Finemet amorphous alloy
YANG Sha(杨 沙)1, 2, CHEN Bo-qu(陈伯渠) 1, 2, YAN Biao(严 彪) 1, 2,
LU Wei(陆  伟) 1, 2, LONG Ling(龙  玲) 1, 2, CHEN Zhi-hui(陈

1. Shanghai Key Laboratory of D&A for Metal-Functional Materials, Tongji University, Shanghai 200092, China;
2. School of Materials Science and Engineering, Tongji University, Shanghai 200092, China

Abstract:In order to study high-frequency soft magnetic properties of Finemet amorphous alloy, the microstructural change and nanocrystallization under different heat treatment conditions were investigated by XRD and TEM. The crystallite size of α-Fe was calculated from the XRD pattern using the Scherrer formula, while the high frequency magnetic properties were measured at room temperature by TPS-200SA exchange tester. The results of XRD and TEM indicate that the nanocrystallization occurs at 500 ℃. When the annealing temperature increases to 560 ℃, the amorphous alloy becomes totally nanocrystallized and the crystallites distribute homogeneously, thus an excellent combination of soft magnetic properties is obtained.

 

Key words: amorphous alloy; heat treatment; high frequency soft magnetic properties

ISSN 1672-7029
CN 43-1423/U

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