Nd-(Fe,Co)-B Sintered Magnets and Their Thermal Stability in Magnetic Properties

被引：0
作者：
Li, Bang-chen [1 ,2 ]
Zhao, Ji-zhong [1 ,2 ]
Wang, Chao [1 ,2 ]
Liu, Yan-li [2 ]
Bai, Suo [2 ]
Li, Zhu-bai [1 ,3 ]
机构：
[1] Inner Mongolia Univ Sci & Technol, Sch Rare Earth Ind, Baotou 014010, Peoples R China
[2] Inner Mongolia Univ Sci & Technol, Sch Sci, Baotou 014010, Peoples R China
[3] Inner Mongolia Univ Sci & Technol, Key Lab Green Extract & Efficient Utilizat Light R, Minist Educ, Baotou 014010, Peoples R China
来源：
JOURNAL OF MAGNETICS | 2025年 / 30卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Nd-(Fe; Co)-B; thermal stability; Curie temperature; coercivity; minor phases; FE-B MAGNETS; ND; CO; COERCIVITY; TEMPERATURE; DY; MICROSTRUCTURE; IMPROVEMENT; SUBSTITUTION; ENHANCEMENT;
D O I：
10.4283/JMAG.2025.30.1.12
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In Nd2Fe14B magnets the magnetic properties degrade significantly with increasing the temperature. In this paper, the effect of Co atoms substituting for Fe is investigated in the sintered magnets of Nd13.5(Fe,M)80.7-xCoxB5.8, aiming to enhance the thermal stability of magnetic properties. The remanence increases a little as the Co content is less than 9 at.%. However, the corecivity decreases monotonously with the increase of Co content, and the reduction in coercivity is greater than that of magnetocrystalline anisotropy field. While at high temperature, the stability of remanence is improved with the increase of Co content, and the decrease degree in coercivity is reduced in Nd13.5(Fe,M)75.7Co5B5.8 and Nd13.5(Fe,M)69.7Co11B5.8, which should partially be attributed to the increase of Curie temperature. By modifying the effect of minor phases and enhancing the anisotropy of grain boundary in Nd-(Fe,Co)-B magnets, both a high remanence and a high coercivity could be obtained at high temperature.
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页数：100
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