Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (6): 2007-2012.doi: 10.13229/j.cnki.jdxbgxb20200627

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Phase transformation and magnetic properties of MnBi alloys by sintered and quenched

Yuan-long E(),Hong-sheng JIA(),Xin-xuan YANG,Dong-fei LI,Mei LIU,Hai-bo LI   

  1. Key Laboratory of Functional Materials Physics and Chemistry，Ministry of Education，Jilin Normal University，Siping 136000，China
  • Received:2020-05-16 Online:2021-11-01 Published:2021-11-15
  • Contact: Hong-sheng JIA E-mail:eyaunlong@jlnu.edu.cn;jiahs@jlnu.edu.cn

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Abstract:

High-pure MnBi alloy was successfully synthesized by closed cryogenic sintering and then rapid quenching method. The phase transformation of the Mn-Bi samples in the sintering process were studied by differential thermal analyzer (DTA). The phases and magnetic properties of the samples were characterized by X-ray diffractometer (XRD) and vibration sample magnetometer (VSM). The results show that the low-temperature phase MnBi alloy block material with high purity can be obtained at 1∶1.3 (n(Bi)∶n(Mn))，275 ℃, 20 h. At 50~350 K, the magnetization decreases with the increasing of temperature, and the coercivity Hc and residual magnetization Mr decrease firstly and then increase. When the temperature is lower than 200 K, the sample is more likely to approach saturation with the decrease of temperature. At 50 K, the saturation magnetization of the sample is 78.0 Am2/kg. The preparation process used in this research is simple and the quantity production of alloy can be realized , which has an important reference value for the preparation of the new type alloy material.

Key words: MnBi alloy, sinter, phase transformation, magnetic properties

CLC Number: 

  • TM273

Fig.1

Schematic diagram of assembly section ofmolybdenum cup cavity"

Fig.2

DTA spectra of samples with different atomic ratio"

Table 1

Phase transition temperature of sampleswith different atomic ratio"

相变温度n（Bi）/n（Mn）
1∶11∶1.31∶1.5
T1/℃267.7267.9267.6
T2/℃274.2274.9275.1
T3/℃312.3332.2342.5

Fig.3

XRD spectra of samples at differentsintering time"

Fig.4

Grain size of samples at different sintering time"

Fig.5

XRD spectra of samples with differentatomic ratio"

Fig.6

Grain size of samples with different atomic ratio"

Fig.7

Hysteresis loops of samples"

Table 2

Specific saturation magnetization andcoercivity of samples"

测试温度/K
50100150200250300350

矫顽力/

（kA·m-1）

4.02.22.510.518.732.178.9
剩余磁化强度/（Am2·kg-1）3.12.22.35.48.412.821.8
1 李海波,张玉梅,刘梅,等. FePt/Ag薄膜的结构和磁性[J]. 吉林大学学报:工学版,2010, 40(6):1572-1576.
Li Hai-bo, Zhang Yu-mei, Liu Mei, et al. Structure and magnetic properties of FePt/Ag thin film[J]. Journal of Jilin University (Engineering and Technology Edition), 2010, 40(6):1572-1576.
2 Nguyen T X, Vuong O K T, Nguyen H T, et al. Preparation and magnetic properties of MnBi/Co nanocomposite magnets[J]. Journal of Electronic Materials, 2017, 46(6):3359-3366.
3 Ito M, Tanaka Y, Satoh T, et al. Magnetic properties and structure of low temperature phase MnBi with island structure[J]. AIP Advances, 2017, 7(5):No.056226.
4 Kim S, Moon H, Jung H, et al. Magnetic properties of large-scaled MnBi bulk magnets[J]. Journal of Alloys and Compounds, 2017, 708:1245-1249.
5 Cao S, Yue M, Yang Y X, et al. Magnetic properties and thermal stability of MnBi/NdFeB hybrid bonded magnets[J]. Journal of Applied Physics, 2011, 109(7): No.07A740.
6 Jensen B A, Tang W, Liu X B, et al. Optimizing composition in MnBi permanent magnet alloys[J]. Acta Materialia, 2019, 181:595-602.
7 Huang Y L, Shi Z Q, Hou Y H, et al. Microstructure, improved magnetic properties, and recoil loops characteristics for MnBi alloys[J]. Journal of Magnetism and Magnetic Materials, 2019, 485:157-164.
8 Nguyen T X, Nguyen V V. Fabrication of MnBi alloys with high ferromagnetic phase content: effects of heat treatment regimes and dopants[J]. Journal of Materials Science: Materials in Electronics, 2019, 30: 6888-6894.
9 Cao J, Huang Y L, Hou Y H, et al. Microstructure and magnetic properties of MnBi alloys with high coercivity and significant anisotropy prepared by surfactant assisted ball milling[J]. Journal of Magnetism and Magnetic Materials, 2019, 473: 505-510.
10 Xiang Z, Wang T L, Ma S J, et al. Microstructural evolution and phase transformation kinetics of MnBi alloys[J], Journal of Alloys and Compounds, 2018, 741: 951-956.
11 曹俊,黄有林,闫小童,等. MnBi合金的磁性能与回复曲线研究[J]. 功能材料,2018,49(6):6119-6123.
Cao Jun, Huang You-lin, Yan Xiao-tong, et al. Magnetic performance and recoil loops characteristics of MnBi alloy[J]. Journal of Functional Materials, 2018, 49(6): 6119-6123.
12 刘泽民,张素银,邵诚,等. 无稀土MnBi永磁合金的研究进展[J]. 科技咨询,2016,14(34):80-84.
Liu Ze-min, Zhang Su-yin, Shao Cheng, et al. The research progress of rare-earth free permanent magnetic alloy in MnBi[J]. Science & Technology Information, 2016,14(34): 80-84.
13 张素银,刘泽民,邵成,等. 稀土元素Gd对MnBi合金的微结构与磁性能的影响[J]. 功能材料,2017,48(1):1221-1224, 1229.
Zhang Su-yin, Liu Ze-min, Shao Cheng, et al. Effect of rare earth elements Gd doping on microstructure and magnetic properties of MnBi alloy[J]. Journal of Functional Materials, 2017, 48(1): 1221-1224, 1229.
14 Kang K, Moodenbaugh A R, Lewis L H. MnBi nanostructures: size dependence of magnetostructural transition and matrix templating[J].Applied Physics Letters, 2007, 90(15):No.153112.
15 Yang J B, Kamarju K, Yelon W B, et al. Magnetic properties of the MnBi intermetallic compound[J]. Applied Physics Letters, 2001, 79(12): 1846-1848.
16 Yang J B, Yang Y B, Chen X G, et al. Anisotropic nanocrystalline MnBi with high coercivity at high temperature[J]. Applied Physics Letters, 2011, 99(8):No.082505.
17 黄潇,李传健,李卫. 粉末混合烧结法制备MnBi永磁合金的研究[J]. 金属功能材料,2006,13(2):14-16.
Huang Xiao, Li Chuan-jian, Li Wei. Preparation of MnBi permanent alloy using powder technique[J]. Metallic Functional Materials, 2016, 13(2): 14-16.
18 蒋欢畅,张朋越,葛洪亮,等. 熔淬法制备MnxBi100-x永磁合金的成相过程和磁性能[J]. 磁性材料及器件,2014,45(2):6-8.
Jiang Huan-chang, Zhang Peng-yue, Ge Hong-liang, et al. Phase formation behavior and magnetic properties of MnxBi100-x permanent magnetic alloys prepared by melt-spinning[J]. Journal of Magnetic Materials and Devices, 2014, 45(2): 6-8.
19 钟文定,杨正. 锰铋合金在不同热处理后的磁性研究[J]. 物理学报,1962,18(4):188-193.
Zhong Wen-ding, Yang Zheng. Magnetic properties of MnBi alloys after different heat treatments[J]. Acta Physica Sinica, 1962, 18(4):188-193.
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