MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Magnetic-Field-Induced Acceleration of Phase Formation in τ-Mn-Al
Ryota KobayashiYoshifuru MitsuiRie Y. UmetsuKohki TakahashiMasaki MizuguchiKeiichi Koyama
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2017 Volume 58 Issue 11 Pages 1511-1518

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Abstract

The phase formation of ferromagnetic L10-MnAl (τ-phase) was accelerated by annealing in magnetic field. With in-field annealing at 623 K, the magnetization of the τ-phase annealed at 15 T was a maximum of 72.2 A・m2/kg at 1.5 T, which is over 4 times larger than that annealed without an external magnetic field for the same annealing time. On the other hand, the transformation from τ-phase to β-phase was suppressed under magnetic field. The obtained bulk sample did not show magnetic anisotropy because of the ε-τ solid-state transformation. Obtained results suggested that magnetic field induced acceleration of transformation was due to the gain of Zeeman energy, which increases the driving force of the ε-τ transformation.

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© 2017 The Japan Institute of Metals and Materials
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