物理学报2001，Vol.50Issue(1)：139-143,5.
Nb含量对烧结NdFeB永磁体磁性能及显微结构的影响
INVESTIGATIONS ON THE MAGNETIC PROPERTIES AND MICROSTRUCTURES OF SINTERED NdFeB MAGNETS WITH DIFFERENT Nb ADDITIONS
摘要
Abstract
The magnetic properties and microstructures of a series of sintered magnets Nd33.0Fe65.9-xNbxB1.1(wt%,x=0,0.3,0.6,1.0,1.5,2.0) as well as their relations were investigated in detail. It was found that the grain size of NdFeB magnet without Nb addition was quiet different from each other and the shape of the grains was very irregular, which led to the deterioration of the magnetic properties. The microstructures of the magnets with proper Nb addition became homogeneous and the final size of the grain after annealing was very fine, and, correspondingly, the density of the final magnet was increased to a higher level. Magnetic measurements showed that the coercivity iHc, magnetic remanence Br and energy product (BH)max of the magnet with Nb additions below 1.0wt% were generally higher than those of their Nb-free counterparts. The effect of Nb on the magnetic properties originated mainly from the homogenization of the microstructure due to Nb addition.关键词
NdFeB/NdFeNbB/永磁材料/显微结构分类
数理科学引用本文复制引用
成问好,李卫,李传健..Nb含量对烧结NdFeB永磁体磁性能及显微结构的影响[J].物理学报,2001,50(1):139-143,5.基金项目
国家自然科学基金(批准号：50071051)资助的课题. Project supported by the National Natural Science Foundation of China (Grant No.50071051). （批准号：50071051）
