摘要
为研究退火处理对钕铁硼磁体微观结构和磁性能的影响,对粉末烧结钕铁硼磁体在500~600℃下进行退火处理,采用XRD、SEM、磁性能测量仪对NdFeB磁体进行分析与表征。结果表明,退火处理对NdFeB磁体主相Nd_(2)Fe_(14)B的结构影响很小,主要是影响富Nd相的分布与成分。退火处理后NdFeB磁体的内禀矫顽力都有不同程度的提升。经550℃退火处理后,富Nd相连续、均匀分布于主相Nd_(2)Fe_(14)B晶粒边界,且富Nd相中Nd的含量增加,Fe的含量降低,磁体的内禀矫顽力提升效果最佳,从1135 kA/m提高到1434 kA/m,相应提升了26.3%;退火处理后磁体的剩磁没有明显变化,最大磁能积有不同程度的降低。
To investigate the effect of annealing treatment on the microstructure and magnetic properties of NdFeB magnets,powder sintered NdFeB magnets were annealed at 500-600℃.XRD,SEM and magnetic performance measuring instruments were used to analyze and characterize the NdFeB magnets.The results show that the annealing treatment has little effect on the structure of the main phase Nd_(2)Fe_(14)B of the NdFeB magnets,but mainly affects the distribution and composition of the rich-Nd phase.After annealing treatment,the coercivity of the NdFeB magnets is improved to varying degrees.After annealing at 550℃,the rich Nd phase is continuous and uniformly distributed along the grain boundaries of the Nd_(2)Fe_(14)B main phase,and the content of Nd in the rich-Nd phase increases while the content of Fe decreases,and the coercivity of the magnets has the best improvement effect,increasing from 1135 kA/m to 1434 kA/m,correspondingly increased by 26.3%.After annealing treatment,the residual magnetism of the magnets doesn't change significantly,but the maximum magnetic energy product decreases to varying degrees.
作者
李欢
王俊勃
刘江南
思芳
吴树杰
董义
Li Huan;Wang Junbo;Liu Jiangnan;Si fang;Wu Shujie;Dong Yi(Xi'an Maurer Petroleum Engineering Laboratory Co.,Ltd.,Xi'an Shaanxi 710065,China;School of Materials Engineering,Xian Polytechnic University,Xi'an Shaanxi 710048,China;Baotou Tianhe Magnetic Materials Technology Co.,Ltd.,Baotou Inner Mongolia 014010,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第12期57-61,共5页
Heat Treatment of Metals
关键词
钕铁硼磁体
退火温度
微观结构
内禀矫顽力
剩磁
最大磁能积
NdFeB magnets
annealing temperature
microstructure
coercivity
residual magnetism
maximum magnetic energy product
