Synthesis and magnetic properties of Sb added MnBi magnets for applications at sub-zero temperatures

被引：6

作者：

Bae, Cheoljun ^{[1
]}

Lee, Gyutae ^{[1
]}

Kang, Min Kyu ^{[1
]}

Lee, Hansol ^{[1
]}

Moon, Ki Woong ^{[2
]}

Kim, Jongryoul ^{[1
]}

机构：

[1] Hanyang Univ, Dept Mat Sci & Chem Engn, Ansan 15588, South Korea

[2] Korea Testing Lab, Syst & Energy Div, Mat Technol Ctr, Ansan 15588, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 899卷

基金：

新加坡国家研究基金会;

关键词：

Rare-earth free permanent magnet; MnBi alloy; Gas-atomization process; Surfactant-assisted wet compaction; Crystal anisotropy; Magnetic properties; COERCIVITY; SUBSTITUTION; COMPACTION; SIMULATION; ALLOYS; PHASE;

D O I：

10.1016/j.jallcom.2021.163365

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：

MnBi-LTP bulk magnets containing substitutional Sb element were fabricated using gas-atomizing process, surfactant-assisted wet magnetic compaction process, and thermal compaction process. Magnetic properties and microstructures were investigated according to the processing parameters. It was found that substitutional Sb element effectively refined the grain size of gas-atomized powders. The conventional ball milling process was able to pulverize these powders into fine particles with a single crystalline structure and minimize their phase decomposition, resulting in a (BH)(max) of 11.0 MGOe. By analyzing the effects of the compaction pressure on the density and magnetic alignment during the surfactant-assisted wet compaction process, Mn54Bi45.9Sb0.1 bulk magnet with H-c of 10.0 kOe at room temperature and temperature coefficient H-c of 0.68%/K was successfully fabricated. Furthermore, effects of Sb element on the temperature dependency of H-c in the bulk magnet were discussed. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：9

共 32 条

[1] High-coercivity hot-deformed Nd-Fe-B permanent magnets processed by Nd-Cu eutectic diffusion under expansion constraint [J].