Microstructure and Magnetic Properties of MM-Fe-B Magnets Prepared by Spark Plasma Sintering

被引：0

作者：

Zheng, Yuanmin ^{[1
,2
]}

Hu, Xianjun ^{[1
,2
,3
]}

Liu, Renhui ^{[1
,2
]}

Tan, Qiulan ^{[4
]}

Zhou, Toujun ^{[5
]}

Zhu, Heping ^{[1
,2
]}

Li, Yuehai ^{[1
,2
]}

Zhong, Minglong ^{[1
,2
,4
]}

机构：

[1] Jiangxi Univ Sci & Technol, Jiangxi Key Lab Rare Earth Magnet Mat & Devices, Ganzhou, Peoples R China

[2] Jiangxi Univ Sci & Technol, Inst Rare Earth Magnet Mat & Devices IREMMD, Ganzhou, Peoples R China

[3] Guangdong Shengyuan Permanent Magnet Mat Co Ltd, Heyuan 517500, Peoples R China

[4] Shenzhen SinoHf Technol Co Ltd, Shenzhen 518000, Peoples R China

[5] Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2023年 / 59卷 / 12期

关键词：

Magnetic properties; Powders; Permanent magnets; microstructure; MM-Fe-B magnet; spark plasma sintering (SPS); PERMANENT-MAGNETS; PERFORMANCE;

D O I：

10.1109/TMAG.2023.3324723

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

High-density isotropic permanent magnet blocks were prepared using nanocrystalline rapidly quenched MM2.2Fe14B strip powder through spark plasma sintering (SPS) technology. This study investigated the impact of the sintering process on the phase composition, microstructure, and magnetic properties of MM-Fe-B SPS magnets. The results show that with the increase of sintering temperature, the porosity of the magnet decreases and the density of the magnet increases gradually. At a sintering temperature of 700 C-degrees/50 MPa/5 min, the magnet exhibited relatively small grain size, and superior comprehensive performance, including coercivity H-cj = 525 kA/m, remanence B-r = 0.76 T, maximum magnetic energy product (BH)(max) = 82 kJ/m(3). Isotropic nanocrystalline MM-Fe-B based magnets were prepared by SPS, which provides a new guidance for the research and development of permanent magnet materials prepared by ionic mixed rare earth.

引用

页数：5