首页|Microstructure and magnetic properties of Sm-Co-based amorphous nanocrystals controlled by B addition
Microstructure and magnetic properties of Sm-Co-based amorphous nanocrystals controlled by B addition
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NSTL
Elsevier
The crystalline Sm-Co alloys show excellent hard magnetic properties, while the amorphous Sm-Co alloys have a poor performance. In this paper, Sm12Co76-xFe4Zr7Cu1Bx (x = 0, 2, 4, 5, 5.2) ribbons were melt-spun at 40 m/s, and the effects of B content on the phase composition, microstructure, and magnetic properties of the ribbons were studied. The results show that the main phase of all ribbons with different B content is Sm(Co, M)7. With an increase in B content, the content of amorphous and fine soft magnetic phases increases. Besides, nano-scale crystalline clusters are embedded in the amorphous matrix, forming different forms of exchange coupling microstructures between the soft and hard magnetic phases. The x = 5 ribbons have the finest grains, the most uniform grain distribution, and the strongest exchange coupling effect. Without heat treatment, their coercivity reaches 19.5 ± 0.9 kOe, and the other magnetic properties are also excellent, Mr = 24.8 ± 1.7 emu/g, M2T = 29.0 ± 1.7 emu/g, and Mr/M2T = 0.858 ± 0.015.
Amorphous nanocrystalline alloyMagnetic propertiesMicrostructureRare earth permanent magnetic materials
Yu X.、Wang S.、Zhang Z.-Y.、Sun J.-B.、Zhang Y.
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Key Lab. for New Type of Functional Materials in Hebei Province Hebei University of Technology
Beijing National State Key Laboratory of Magnetism Institute of Physics Chinese Academy of Sciences
NSTL
Elsevier
