Grain boundary diffusion efficiency of sintered Nd-Fe-B magnets by Al, Sn and Zn addition

被引：11

作者：

Zhong, Shuwei ^{[1
,2
]}

Yang, Munan ^{[1
,2
,3
]}

Wang, Hang ^{[1
,2
]}

Rehman, Sajjad Ur ^{[1
,2
]}

Yu, Xi

Luo, Sangen ^{[1
,2
]}

Li, Longgui ^{[4
]}

Li, Chao ^{[4
]}

Xiong, Shuhua ^{[5
]}

Yang, Bin ^{[1
]}

机构：

[1] Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Peoples R China

[2] Natl Rare Earth Funct Mat Innovat Ctr, Ganzhou 341000, Peoples R China

[3] Ganjiang Innovat Acad, Chinese Acad Sci, Ganzhou 341000, Peoples R China

[4] Ganzhou Dongci Rare Earth Co Ltd DMEGC, Ganzhou 341000, Peoples R China

[5] Jiangxi Rare Earth Funct Mat Technol Co Ltd, Ganzhou 341000, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 967卷

关键词：

Sintered Nd -Fe -B magnets; Low melting point elements; Diffusion efficiency; Coercivity; COERCIVITY ENHANCEMENT; ROTATING DIFFUSION; THERMAL-STABILITY; CU-AL; TB; DY; MICROSTRUCTURE; PR; SUBSTITUTION; MECHANISM;

D O I：

10.1016/j.jallcom.2023.171676

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The composition and structure of sintered Nd-Fe-B magnets influence the depth and efficiency of grain boundary diffusion. In this paper, the submicron Al, Sn, Zn metal powders are introduced in the precursor powder to improve the infiltration effect. The transformation temperature of the Nd-rich phase decreases from 471 degrees C for the standard alloy to 436 degrees C, 442 degrees C and 443 degrees C for Al, Sn and Zn elements addition, respectively. The addition of Al, Sn and Zn improves the microstructure and promotes the diffusion of Tb into the 2:14:1 phase. The addition of these low melting point elements effectively promotes the diffusion depth and the total amount of Tb element at the early stage of the diffusion. The intrinsic coercivity of Al-, Sn- and Zn-added magnets increased by 8.86 kOe, 9.70 kOe and 8.98 kOe, respectively. These results provide a basis for the preparation of high coercivity NdFe-B magnets using less heavy rare earth elements.

引用

页数：8

共 35 条

[1] Effect of rare earth content on TbF3 diffusion in sintered Nd-Fe-B magnets by electrophoretic deposition [J].