Microstructure and magnetic properties of MnBi powders prepared by various ball milling processes

Chengyu Li; Yang Yang; Shunda Lu; Zhen Xiang; Linfeng Chen; Nguyen Xuan Truong; Huiyu Xu; Wei Lu

doi:10.1088/2053-1591/ad1f99

Materials Research Express (Jan 2024)

Microstructure and magnetic properties of MnBi powders prepared by various ball milling processes

Chengyu Li,
Yang Yang,
Shunda Lu,
Zhen Xiang,
Linfeng Chen,
Nguyen Xuan Truong,
Huiyu Xu,
Wei Lu

Affiliations

Chengyu Li: Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University , Shanghai 201804, People’s Republic of China
Yang Yang: Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University , Shanghai 201804, People’s Republic of China
Shunda Lu: Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University , Shanghai 201804, People’s Republic of China
Zhen Xiang: Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University , Shanghai 201804, People’s Republic of China
Linfeng Chen: Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University , Shanghai 201804, People’s Republic of China
Nguyen Xuan Truong: Graduate University of Sciences and Technology, Vietnam Academy of Science and Technology . No.18, Hoang Quoc Viet road, Cau Giay district, Hanoi, Vietnam; Institute of Materials Science, Vietnam Academy of Science and Technology , No.18, Hoang Quoc Viet road, Cau Giay District, Hanoi, Vietnam
Huiyu Xu: Baosteel Magnetics Co. Ltd , No. 2029, Baoyang Road, Baoshan District, Shanghai 201999, People’s Republic of China
Wei Lu: ORCiD; Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University , Shanghai 201804, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ad1f99
Journal volume & issue: Vol. 11, no. 1
p. 016520

Abstract

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The MnBi intermetallic compound with high purity of low-temperature phase MnBi (LTP-MnBi) and high maximum energy product ( BH ) _max were successfully prepared using various ball milling processes. The effects of ball milling speed and duration on the microstructures, phase compositions, and magnetic properties of MnBi alloys were systematically investigated. The particle size of MnBi and the purity of LTP-MnBi gradually decreased with increasing ball milling speed. An optimized ball milling speed of 175 rpm resulted in MnBi powder with the ( BH )max of 9.22 MGOe and a squareness ( M _r / M _s ) of 93.7%. Furthermore, the ball milling duration was optimized to observe its impact on the MnBi alloy. As the duration increased, the average particle size of MnBi decreased from 27 μ m at 0 h to 1.84 μ m at 10 h. Simultaneously, the coercivity ( H _c ) increased from 0.7 T at 0 h to 1.7 T at 10 h. Ultimately, the powder ball milled at 175 rpm for 5 h exhibited the highest ( BH ) _max of 11.3 MGOe.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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