摘要
采用Tb_(4)O_(7), TbHx和Nd_(2)O_(3)+Tb_(4)O_(7)三种扩散源,通过晶界扩散技术制备出特高综合磁性能的钕铁硼磁体,对不同扩散源的扩散效果及扩散机制进行研究。采用TbHx进行晶界扩散,获得综合磁性能(BH)max+Hcj=84.26,矫顽力温度系数为-0.361%·℃^(-1)的最佳钕铁硼磁体,SEM微观结构分析表明TbHx扩散源制备磁体在靠近磁体的表层晶粒形态与中心晶粒一致,晶粒表面平整。
The grain boundary diffusion Nd-Fe-B magnets with extremely high comprehensive magnetic properties were prepared by three diffusion sources Tb_(4)O_(7), TbHx and Nd_(2)O_(3)+Tb_(4)O_(7) respectively, and the diffusion effect and mechanism of diffusion magnet with different diffusion sources were studied. Treated with TbHx, an extremely high comprehensive magnetic performance magnet with a(BH)max+Hcj=84.26 was obtained, and the temperature coefficient of Hcj of the magnet was-0.361%·℃^(-1) between 20 and 220 ℃. SEM microstructure analysis of magnet treated with TbHx showed that grains of the surface were as smooth and integral as grains of the interior.
作者
张民
王春国
吕向科
竺晓东
毛越
沈国迪
潘佳静
Zhang Min;Wang Chunguo;Lü Xiangke;Zhu Xiaodong;Mao Yue;Shen Guodi;Pan Jiajing(Ningbo Yunsheng Co.,Ltd.,Ningbo 315800,China)
出处
《中国稀土学报》
CAS
CSCD
北大核心
2021年第4期570-574,共5页
Journal of the Chinese Society of Rare Earths
基金
宁波市科技创新2025重大专项项目(2018B10015)资助。
