Enhancement mechanism of maximum energy product in hot-deformed Nd-Fe-B magnets by addition of ferromagnetic substances  

作　　者：Lian Wu Xianshuang Xia Wenzong Yin Xu Tang Jinyun Ju Yeyuan Du Renjie Chen Zhiyi Xu Shenglei Che Aru Yan 

机构地区：[1]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,310034,China [2]Research Center of Magnetic and Electronic Materials,Zhejiang University of Technology,Hangzhou,310034,China [3]CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China [4]University of Chinese Academy of Sciences,Beijing,100049,China [5]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou,341119,China [6]Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Journal of Rare Earths》2023年第12期1984-1989,I0006,共7页稀土学报（英文版）

基　　金：Project supported by the Zhejiang Province Technology Application Research Project (LGG19E010001);the Zhejiang Province Postdoctoral Science Foundation (ZJ2021080);the Key Research Program of the Chinese Academy of Sciences (ZDRW-CN2021-3)。

摘　　要：It has been proved that the maximum magnetic energy product(BH)maxof hot-deformed Nd-Fe-B magnets can be effectively improved by adding substances with either high melting point or high saturation magnetization.In this work,we selected a ferromagnetic nano Fe_(55)Ni_(28)Co_(17) alloy powders with both high melting point and high saturation magnetization as the dopant to improve the(BH)max.By the addition of 1 wt% FeNiCo,the remanence increases by over 5%(from 1.36 to 1.44 T),resulting in a significant enhancement of(BH)maxfrom 355 to 396 kJ/m^(3)(from 44.6 to 49.7 MGOe).Microstructure observations reveal that the texture of grain alignment is improved,the concentrations of ferro magnetic elements(Fe,Ni,and Co) in the main phase and intergranular phase are increased so that the magnetization behavior of hot-deformed magnet changes(more easily shows reversible magnetization behaviors),which are the reasons why the high maximum energy product of hot-deformed magnet,is obtained.

关 键 词：ND-FE-B Ferromagnetic substance FeNiCo alloys Magnetic properties RAREEARTHS 

分 类 号：TM27[一般工业技术—材料科学与工程]