Materials Transactions Online

Materials Transactions, Vol.58 No.05 (2017) pp.720-723
© 2017 The Japan Institute of Metals and Materials

Enhancement of the Phase Formation Rate during In-Field Solid-Phase Reactive Sintering of Mn-Bi

Daiki Miyazaki1, Yoshifuru Mitsui1, Rie Y. Umetsu2, Kohki Takahashi2, Satoshi Uda2 and Keiichi Koyama1

1Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan
2Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

Microstructural analysis was performed for Mn-Bi prepared by in-field solid-phase reactive sintering, in order to investigate the origin of magnetic field effects on the reaction. The number of formed MnBi phase around Mn grain in 10 T was almost 3 times larger than that in a zero field. The results indicated that the magnetic field enhanced the phase formation rate of MnBi phase. Due to the enhancement of the phase formation rate, the fraction of MnBi phase was drastically increased by in-field annealing.

[doi:10.2320/matertrans.MBW201609]

(Received 2016/11/18; Accepted 2017/02/22; Published 2017/04/25)

Keywords: high magnetic fields, MnBi, microstructural observation, solid-phase sintering, phase formation

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