摘要
通过研究Nd4.5Fe76.5-xGaxCo1.0B18(x=0-0.6,(原子分数, ％))纳米复合粘结磁体的微结构和矫顽力,发现Ga在晶界富Nd相中的分布高于(Fe,Co)3B和Nd2(Fe,Co)14B相,矫顽力随Ga含量的增加是先下降然后增加,当Ga含量较低时(x=0.2),磁体的矫顽力随退火时间的变化关系出现一个明显的峰值,这些现象可用合金的微结构和纳米双相复合磁体的交换耦合作用来解释.
The microstructure and coercivity of nanocomposite Nd4.5Fe76.5-xGaxCo1.0B18 (x=0-0.6 (atomic fraction, %)) bonded magnets were studied. The results show that addition of small amount of Ga in Nd4.5Fe76.5-xGaxCo1.B-0(18) makes the grains finer and more uniform. A notable peak of coercivity was observed on the variation curve of coercivity with annealing time when Ga content is low (x=0.2). This phenomenon could be explained by the microstructure and the exchange coupling interaction,of two-phase nanocomposite.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第2期217-220,共4页
Acta Metallurgica Sinica
基金
国家高技术研究发展计划2001AA320401
国家自然科学基金50071051
10074013资助项目
关键词
纳米复合磁体
矫顽力
交换耦合
粘结磁体
Nd-4.5(Fe, Ga, Co)(77.5)B18
nanocomposite magnet
coercivity
exchange coupling
