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| Preparation of Sintered (Ce1-xNdx)30FebalCu0. 1B1 Magnets by Blending Powder Method |
| Shu-lin HUANG1,2,3,Hai-bo FENG1,3,Ming-gang ZHU1,3,An-hua LI1,3,Yue ZHANG2,Wei LI1,3 |
1. Functional Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
3. Beijing Engineering Laboratory of Advanced Metallic Magnetic Materials and Preparation Techniques,Beijing 100081, China |
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Abstract Magnets with nominal compositions of (Nd1-xCex)30FebalCu0. 1B1 (x=0, 0. 15, 0. 3 and 0. 4, mass%) have been fabricated by blending powder method. The remanence (Br), intrinsic coercivity (Hc) and maximum energy product (BH)max of the RE2Fe14B type magnets deteriorated when Nd was replaced by Ce. The chemical composition and crystal structure of magnet were investigated systemically. Backscattered electron (BSE) and energy dispersive spectroscopy (EDS) results revealed that Ce-rich and Ce-lean matrix grains coexisted in the magnets. The magnetic coupling mechanism among the double hard magnetic phases was discussed. Low melting point RE-Cu phase was in favor of the formation of uniform continuous grain boundary. Transmission electron microscopy (TEM) investigation showed the presence of fcc (Nd,Ce)Ox phase in the grain boundary. When the Ce content was 15% of the total amounts of all the rare earth, the maximum energy product of the sintered magnet was 359. 8 kJ/m3.
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Received: 10 December 2014
Published: 17 July 2015
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| Fund:the National Natural Science Foundation of China;the National High Technology Research and Development Program of China;the National Science and Technology Support Program of China |
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2015, Vol. 22 
