Effects of Mo doping on the phase transformation behaviors and the magnetic properties of rare-earth-free MnBi alloy

被引:0
作者
Xiang, Zhen [1 ]
Wang, Junwei [1 ]
Yang, Yang [1 ]
Li, Chengyu [1 ]
Xu, Huiyu [2 ]
Nguyen, Truongxuan [3 ]
Lu, Wei [1 ]
机构
[1] Tongji Univ, Sch Mat Sci & Engn, Key Lab Adv Civil Engn Mat, Shanghai Key Lab D&A Met Funct Mat,Minist Educ, Shanghai 201804, Peoples R China
[2] Baosteel Magnet Co Ltd, 2029 Baoyang Rd, Shanghai 201999, Peoples R China
[3] Grad Univ Sci & Technol, Vietnam Acad Sci & Technol, 18 Hoang Quoc Viet Rd, Hanoi, Vietnam
来源
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 27卷
关键词
Rare-earth-free permanent magnet; MnBi alloy; Mo doping; Magnetic properties; GA;
D O I
10.1016/j.jmrt.2023.11.197
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The high-performance rare-earth-free low-temperature phase Mn-Bi-based permanent magnet alloys (LTP-MnBi) have gained widespread attention, but it still presents a challenge. Here, the LTP-MnBi alloy with Mo element doping was prepared by using arc-melting and subsequent high-vacuum annealing. The crystalline structure, phase transformation behavior, and magnetic properties were systematically investigated. The result showed that Mo element doping significantly improved the stability of the LTP in MnBi alloy. The investigation revealed that the disparity in atomic radius between Mo and Mn, Bi elements played a pivotal role in the formation and stability of the LTP-MnBi. With the increase of Mo content in the LTP-MnBi alloy, the coercivity value remarkably increased from 8.1 kOe to 11.7 kOe with a decrease of saturation magnetization from 71.6 emu/g to 56.5 emu/g, and the maximum energy product gradually reduced from 10.6 MGOe to 7.9 MGOe. The underlying mechanism revealed that magnetic properties were closely related to the fraction and crystal structure of LTP-MnBi. Therefore, magnetic properties of Mo-doped MnBi alloy make them an attractive candidate among the rare-earth-free permanent magnets.
引用
收藏
页码:7364 / 7367
页数:4
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