Preparation of Sintered(Ce_(1-x)Nd_x)_(30)Fe_(bal)Cu_(0.1)B_1 Magnets by Blending Powder Method

作     者：Shu-lin HUANG Hai-bo FENG Ming-gang ZHU An-hua LI Yue ZHANG Wei LI 

作者机构：Functional Materials Research InstituteCentral Iron and Steel Research Institute School of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing Engineering Laboratory of Advanced Metallic Magnetic Materials and Preparation Techniques 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2015年第22卷第7期

页      面：598-601页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Item Sponsored by National Natural Science Foundation of China(51171048) National High Technology Research and Development Program of China(2014CB643701) National Science and Technology Support Program of China(2012BAE02B01) 

主　　题：(Nd1-x Cex ) 30 FebalCu0.1 B1 magnet magnetic property microstructure grain boundary 

摘      要：Magnets with nominal compositions of （ Nd1-x Cex ） 30 Febal Cu0.1 B1 （x = 0, 0.15, 0.3 and 0.4, mass% ） have been fabricated by blending powder method. The remanence （B r）, intrinsic coercivity （He） and maximum en- ergy product （BH） 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/ms.