Ce对NdFeB永磁体磁性能和微观结构的影响  

Effect of Ce Addition on Magnetic Properties and Microstructure of NdFeB Based Rare Earth Permanent Magnets

作　　者：张雪峰[1,2] 史孟飞[1,2] 李培忠 戴永峰 马强 李永峰[1,2] 

机构地区：[1]内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010 [2]内蒙古科技大学数理与生物工程学院,内蒙古包头014010 [3]包头华美稀土高科有限公司,内蒙古包头014060

出　　处：《稀土》2013年第4期12-16,共5页Chinese Rare Earths

基　　金：内蒙古自治区科学基金(2012MS0802);包头市科技攻关项目(2009J1006)

摘　　要：研究了稀土元素Ce的添加对NdFeB性能的影响。随着Ce含量增加,样品的磁性能剩磁、矫顽力、磁能积分别下降。对比结果:添加量10%时,磁体性能较优,剩磁1.2 T,内禀矫顽力1002 kA/m,最大磁能积273.7kJ/m3。使用XRD检测磁体中CeO2衍射峰增强,SEM观察烧结样品富钕相富集区域增加,样品中孔隙数和孔洞直径明显增大造成磁性能恶化。Ce含量增加导致性能下降,但本实验室制造的(Nd,Ce)2Fe14B磁能积仍在30 MGOe～35 MGOe范围,因而探索稀土元素Ce替代Nd的工作仍然具有积极的经济效益和社会意义。This paper researches the effect of Ce addition on ：properties of NdFeB permanent magnet. With the increase of the amount Ce , the remanence,intrinsic coereivity and magnetic energy product of the samples deciined. When content of ceri- um in （Nd, Ce）2Fe14B was 10% ,the remanence, coercivity and maximum magnetic energy product of the sample were 1.2T,1007kA/m and 273.7k J/m3 ,separately. The results of XRD showed that diffraction peaks of CeO2 increased with increase of CeO2 content. The SEM analysis indicated that neodymium - rich phase increased markedly with increase of CeO2 content from 5% to 10% ,both the number and diameter of pores increased when CeO2 content was 15% to 20%, which deteriorated the magnetic properties of the sample.

关 键 词：添加元素 烧结钕铁硼磁体 磁性能 微观结构 

分 类 号：TG383[金属学及工艺—金属压力加工] TG139[一般工业技术—材料科学与工程]