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Microstructure and magnetic properties of sintered CeCo4.325-xCuo.675Fex magnets

Anisotropic CeCo4.325_xCuo.675Fex (x : 0.475- 0.875) sintered magnets were prepared by traditional powder metallurgical method. Influence of ball-nfilling time and iron content on microstructure and magnetic properties of the CeCo4,325-xCuo.675Fex sintered magnets were investigated. It is shown that...

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Bibliographic Details
Published in:稀有金属:英文版 2015 (3), p.164-167
Main Author: Wei Sun Ming-Gang Zhu Yi-Kun Fang Wei Pan Man-Long Xia Wei Li
Format: Article
Language:English
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Summary:Anisotropic CeCo4.325_xCuo.675Fex (x : 0.475- 0.875) sintered magnets were prepared by traditional powder metallurgical method. Influence of ball-nfilling time and iron content on microstructure and magnetic properties of the CeCo4,325-xCuo.675Fex sintered magnets were investigated. It is shown that the properties of the magnet produced by mag- netic powders ball-milled for 40 min are better than that for 30 rain. With iron content increasing, remanence Br and maxi- mum energy product (BH)m increase first and then decrease. The optimal magnetic properties are obtained for the CeCo3.65Cuo.675Feo.675 sintered magnet: Br=0.685 T, the intrinsic coercivity Hci = 350 kA.m-1, and (BH)m : 85.6 kJ.m-3. The increase of Br is mainly influenced by iron content of 1:5 matrix which can properly increase the saturation induction Bs; the rapid increase of the amount of Ce-rich phase and 5:19 phase gives rise to the deterioration of the magnets when x ≥ 0.775.
ISSN:1001-0521
1867-7185