Microstructures and magnetic properties of Ce_(32.15)_Co_(49.36)Cu_(9.84)Fe_(9.65) magnet sintered at different temperatures  

作　　者：SUN Wei ZHU Minggang FANG Yikun PAN Wei LI Jiajie LI Yanfeng LI Wei 

机构地区：[1]Division of functional Materials, Central Iron and Steel Research Institute Group, Beijing 100081, China

出　　处：《Rare Metals》2012年第5期470-473,共4页稀有金属（英文版）

基　　金：supported by the National High-Tech R&D Program of China(No.2010AA03A401);the National Basic Research Program of China(No.2010CB934601);the National Nature Science Foundation of China(Nos.50931001,50901021)

摘　　要：The microstructures and magnetic properties of Ce-32.15Co_49.36Cu_9.84Fe_9.65 magnet sintered at the temperatures ranging from 1005 to 1105 °C were investigated. The results on scanning electron microscopy and X-ray diffraction analysis indicate that the remanence B r of the magnets is mainly influenced by the degree of the easy-axis orientation when sintering temperature is less than 1085 °C, the rapidly increasing amount of the secondly phase (5:19 phase) gives rise to the deterioration of the magnetic properties of the magnet above 1085 °C. Moreover, it is found that intrinsic coercivity H ci is strongly related to the content of copper in the matrix of the sintered magnets. The optimal sintering temperature is located in 1025~1055 °C, the corresponding magnetic properties of the magnets are B_r =0.685T, H_(ci) =350kA·m^-1 , and maximum energy product (BH)_m =85.6 kJ·m 3 .

关 键 词：Ce-Co permanent magnet sintering temperature COERCIVITY 

分 类 号：TF046.4[冶金工程—冶金物理化学]