摘要
采用单辊急冷法并晶化退火制备了高剩磁、高矫顽力和高磁能积的（NdDy）2（FeNb）14B/α-Fe纳米复合永磁合金，其最佳磁性能分别为Br=1.02T，Hci=702KA/m，（BH）max=134KJ/m3．合金的组织结构由硬磁相（NdDy）2（FeNb）14B和软磁相α-Fe在纳米级范围内复合而成·两相的平均晶粒尺寸为30nm．该种合金优异的磁性能起源于纳米晶硬磁相和软磁相之间的磁交换耦合作用．
High coercivity, high remanence, and high energy product (NdDy)2(FeNb)14B/α-Fe nanocrystalline alloys are prepared by melt spining and subsequent annealing. Thebest properties of remanence (Br), coercivity (Hci) and maximum energy product ((BH)max)are 1.02 T, 702 kA/m and 134 kJ/m3, respectively. The microstructure of the two phasenanocomposite consists of hard magnetic (NdDy)2(FeNb)14B and soft magnetic α-Fe withan average size of 3O nm. These small dimensions allow effective exchange couplingbetween hard and soft magnetic grains and result in the simultaneous enhancement of Br,Hci and (BH)max.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1997年第1期75-78,共4页
Journal of University of Science and Technology Beijing
关键词
交换耦合
永磁合金
复合永磁合金
纳米级
nanocomposite permanent magnets, exchange coupling, remanence enhancement
