TY - JOUR
T1 - High magnetic field effects on the solid-liquid reaction of Fe-Ga system
AU - Mitsui, Yoshifuru
AU - Hagio, Toshiaki
AU - Takahashi, Kohki
AU - Koyama, Keiichi
N1 - Funding Information:
This works partly supported by 26th ISIJ research promotion grant, and KAKENHI grant no. 16K14374. This work was performed at High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University (Project No. 18H0044 and 17H0050).
PY - 2020
Y1 - 2020
N2 - The effect of magnetic fields on solid-liquid reactions in the Fe-Ga binary system was investigated using Fe/Ga diffusion couples. The reaction and phase growth proceeded by diffusion-controlled process for both 0 and 10 T. It is found that the growth of the intermetallic phases was suppressed by magnetic fields of 10 T regardless of whether α-Fe was in a ferromagnetic or paramagnetic state. The pre-exponential factors in the parabolic coefficient of the Fe3Ga + eutectic region at 0 and 10 T were 2.50 ×104 m2/s and 1.32 ×103 m2/s, respectively. Meanwhile, activation energies at 0 and 10 T were 336 kJ/mol and 318 kJ/mol, respectively, which indicated the ineffectiveness of magnetic fields. That is, reduction of pre-exponential factor of the parabolic coefficient leads the magnetic-field-induced suppression of the reaction in Fe/Ga.
AB - The effect of magnetic fields on solid-liquid reactions in the Fe-Ga binary system was investigated using Fe/Ga diffusion couples. The reaction and phase growth proceeded by diffusion-controlled process for both 0 and 10 T. It is found that the growth of the intermetallic phases was suppressed by magnetic fields of 10 T regardless of whether α-Fe was in a ferromagnetic or paramagnetic state. The pre-exponential factors in the parabolic coefficient of the Fe3Ga + eutectic region at 0 and 10 T were 2.50 ×104 m2/s and 1.32 ×103 m2/s, respectively. Meanwhile, activation energies at 0 and 10 T were 336 kJ/mol and 318 kJ/mol, respectively, which indicated the ineffectiveness of magnetic fields. That is, reduction of pre-exponential factor of the parabolic coefficient leads the magnetic-field-induced suppression of the reaction in Fe/Ga.
KW - Fe-Ga
KW - Liquid-solid reaction
KW - Magnetic fields
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U2 - 10.2355/isijinternational.ISIJINT-2019-470
DO - 10.2355/isijinternational.ISIJINT-2019-470
M3 - Article
AN - SCOPUS:85083430871
VL - 60
SP - 807
EP - 811
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 4
ER -