Reactive sintering process of ferromagnetic MnBi under high magnetic fields
Reactive sintering process of ferromagnetic MnBi under high magnetic fields
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DOI：
10.1016/j.jmmm.2018.01.026
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发表时间：
2018-05
影响因子：
2.7
通讯作者：
Y. Mitsui;R. Umetsu;Kohki Takahashi;K. Koyama
中科院分区：
文献类型：
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作者：
Y. Mitsui;R. Umetsu;Kohki Takahashi;K. Koyama
研究了磁场对MnBi反应烧结过程的影响。发现磁场诱导的反应增强在初始阶段表现出来。矫顽力场随着场内退火时间的增加而减小。该反应动力学与扩散控制反应模型非常吻合。这表明反应初始阶段活化能的降低增加了MnBi相的形成量，从而通过现场反应烧结增强了Mn+Bi到MnBi相的反应。
The magnetic field effect on the reactive sintering process of MnBi was investigated. Magnetic-field-induced enhancement of the reaction was found to be exhibited at the initial stages. The coercivity field decreased with an increase in the in-field annealing time. The kinetics of the reaction were in good agreement with the diffusion-controlled reaction model. It is suggested that the decrease in activation energy at the initial stages of reaction increased the amount of formed MnBi phases, resulting in enhancement of the reaction Mn + Bi to MnBi phase by in-field reactive sintering.