添加Ho对烧结Nd-Fe-B永磁材料磁性能与温度稳定性的影响  

Effects of Ho addition on the magnetic properties and temperature stability of sintered Nd-Fe-B magnets

作　　者：刘湘涟[1] 

机构地区：[1]宁波工程学院材料工程研究所,浙江宁波315016

出　　处：《磁性材料及器件》2011年第4期33-36,共4页Journal of Magnetic Materials and Devices

摘　　要：用常规工艺制备烧结（Pr-Nd）33．0-xHOxFebalCu0.20Al0.75B1.15（x=0，1，3，5）永磁材料。研究了Ho元素添加对材料磁性能和温度稳定性的影响。适量添加Ho有利于抑制合金铸锭中α-Fe的形成；制作的烧结磁体，其主相晶粒一定程度上细化、尺寸分布比较均匀；内禀矫顽力明显提高，剩磁有所下降；同时较大幅度地减小烧结磁体的开路磁通不可逆损失。添加1～3％左右Ho制作的烧结Nd-Fe-B磁体，具有良好的综合性能。（ Pr-Nd ）33.0 xHoxFebalCu0.20A10.75BH5 （x=0, 1, 3, 5） sintered magnets were prepared via conventional route. Effects of Ho addition on their magnetic properties and temperature stability were analyzed. The formation of α-Fe phase in Nd-Fe-B alloy ingots was effectively suppressed, the intrinsic coercivity was largely increased, the remanence was slightly reduced and the temperature stability was improved to a great extent by adding certain amounts of Ho. Sintered Nd-Fe-B magnets with 1-3% Ho addition possess small average grain size and relatively homogeneous grain size distribution, and exhibit satisfactory comprehensive properties.

关 键 词：烧结ND-FE-B永磁材料 Ho添加 显微组织 磁性能 温度稳定性 

分 类 号：TM273[一般工业技术—材料科学与工程]