Construction of high-performance multi-main-phase LaCe-based sintered magnets by chemical heterogeneity enhancement

被引：5
|
作者：
Chen, Hao [1 ]
Liu, Weiqiang [1 ]
Guo, Zizhen [1 ]
Yang, Tianyuan [1 ]
Qin, Yuan [1 ]
Li, Yuqing [1 ]
Zhang, Hongguo [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：
MATERIALS LETTERS | 2022年 / 325卷
关键词：
Magnetic materials; Microstructure; Grain boundaries; Chemical heterogeneity; Magnetic properties; COERCIVITY;
D O I：
10.1016/j.matlet.2022.132818
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To further optimize the comprehensive magnetic properties of LaCe-based sintered magnets prepared by constructing a multi-main-phase (MMP) structure, Pr-Fe-B was used as a LaCe-free alloy to prepare MMP sintered magnets with 40 wt% LaCe substitution. Due to the high anisotropy field (H-A) of Pr2Fe14B grains, strong chemical heterogeneity could be provided in MMP magnets. In addition, the Pr-rich phase with a lower melting point enters the MMP magnet, optimizing the composition and structure of the grain boundary (GB) phase. It is beneficial to improve the wettability and promote the formation of continuous GB layers. As a result, the H-cj and (BH)(max) of the MMP magnets reached 9.64 kOe and 37.70 MGOe, leading to an excellent overall magnetic performance of (BH)(max) (MGOe) + H-cj (kOe) = 47.34. This will serve as a reference for the high performance of MMP LaCe-based magnets.
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页数：4
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