The effect of Nd content on the elemental interdiffusion mechanism of Nd-Dy-Fe-B magnets

被引：0
|
作者：
Qin, Yuan [1 ]
Liu, Weiqiang [1 ]
Wang, Zhanjia [1 ]
Chen, Hao [1 ]
Du, Ruihua [1 ]
Yue, Ming [1 ]
机构：
[1] Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China
来源：
AIP ADVANCES | 2024年 / 14卷 / 01期
基金：
中国国家自然科学基金;
关键词：
GRAIN-BOUNDARY DIFFUSION; COERCIVITY ENHANCEMENT; SINTERED MAGNETS; INTRINSIC-COERCIVITY; THERMAL-STABILITY; TB; MICROSTRUCTURE; PHASE;
D O I：
10.1063/9.0000633
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, the effect of Nd content on the interdiffusion mechanism of Nd/Dy elements in Nd-Dy-Fe-B magnets was elucidated by studying the differences in the magnetic properties, microstructure, and demagnetization process. As the Nd content increased, a uniform, continuous, and thicker layer of rare earth-rich (RE-rich) phase formed inside the magnets, which had a good magnetic isolation effect. During the demagnetization process, the strong ferromagnetic coupling effect between the main phase grains could be effectively weakened. At the same time, the thicker RE-rich phase layer could lead to a more obvious interdiffusion phenomenon of Nd/Dy elements, forming more (Nd, Dy)(2)Fe14B phases with high magnetocrystalline anisotropy fields, resulting in higher coercivity of the magnets. This paper elucidated the influence of Nd content on the interdiffusion mechanism of dual alloy Nd-Dy-Fe-B magnets, which had important significance for the preparation of high-performance Nd-Dy-Fe-B magnets.
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页数：5
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