Magnetic property enhancement of rare-earth-free nanocrystalline LTP-MnBi melt-spun ribbons
Zhen Xiang,
Haiyuan Wang,
Cheng Zeng,
Yang Yang,
Shunda Lu,
Huiyu Xu,
Truongxuan Nguyen,
Wei Lu
Affiliations
Zhen Xiang
Shanghai Key Laboratory of D&A for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
Haiyuan Wang
Shanghai Key Laboratory of D&A for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
Cheng Zeng
Shanghai Key Laboratory of D&A for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
Yang Yang
Shanghai Key Laboratory of D&A for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
Shunda Lu
Shanghai Key Laboratory of D&A for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
Vietnam Academy of Science and Technology, Graduate University of Sciences and Technology, No. 18, Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam
Wei Lu
Shanghai Key Laboratory of D&A for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
Rare-earth-free low-temperature-phase MnBi alloys have attracted extensive attention, but achieving high-purity and high-performance remains a challenge. In this study, a low-temperature phase (LTP) MnBi alloy was prepared through melt spinning and vacuum annealing techniques. The crystalline structure, microstructure, and magnetic properties of MnBi alloys were systematically investigated by x-ray diffraction, scanning electron microscopy, and physical property measurement system. Results showed that roller speed effectively improved the purity and coercivity of MnBi alloys. The optimization of process parameters achieved a high saturation magnetization of 70.7 A m2/kg and a significant coercivity of 2.34 T (at 450 K). It revealed that microstructure and magnetic properties were closely associated with rolling speed processes. This work serves as an exemplar for the fabrication of high-performance LTP-MnBi alloys, exhibiting its potential for high-temperature applications.
