Fe-Feinf3/infC binary phase diagram in high magnetic fields

Yoshifuru Mitsui; Yuki Ikehara; Kohki Takahashi; Shojiro Kimura; Goro Miyamoto; Tadashi Furuhara; Kazuo Watanabe; Keiichi Koyama

doi:10.1016/j.jallcom.2015.01.129

Fe-Feinf3/infC binary phase diagram in high magnetic fields

Yoshifuru Mitsui, Yuki Ikehara, Kohki Takahashi, Shojiro Kimura, Goro Miyamoto, Tadashi Furuhara, Kazuo Watanabe, Keiichi Koyama

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23 Citations (Scopus)

Abstract

The Fe-Feinf3/infC binary phase diagram under high magnetic fields up to 21 T was investigated by a differential thermal analysis. Applying a magnetic field of 18 T, the α-γ transformation temperature Tinfα-γ/inf for pure iron increased quadratically from 1181 K (a zero field) to 1206 K. With increasing magnetic field strength, the transformation temperature Ainfc1/inf (α-Fe + cementite → α-Fe + γ-Fe) increased linearly from ∼1000 K to ∼1030 K at the rate of 1.4-1.5 K Tsup-1/sup. The transformation temperature Ainfc3/inf (α-Fe + γ-Fe → γ-Fe) for Fe-0.18 wt.%C and Fe-0.38 wt.%C increased quadratically by 27 K under a 18-T field. The Ainfc1/inf and Ainfc3/inf lines shifted to higher temperatures by the magnetic field, resulting in a change in the Fe-Feinf3/infC phase diagram. The results obtained suggest that the transformation temperatures mainly arose because of the Zeeman energy of α-Fe under high magnetic fields.

Original language	English
Pages (from-to)	251-255
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	632
DOIs	https://doi.org/10.1016/j.jallcom.2015.01.129
Publication status	Published - 2015 May 25

Keywords

Differential thermal analysis
Fe-C alloys
High magnetic fields
Phase diagram
Zeeman energy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2015.01.129

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title = "Fe-Feinf3/infC binary phase diagram in high magnetic fields",

abstract = "The Fe-Feinf3/infC binary phase diagram under high magnetic fields up to 21 T was investigated by a differential thermal analysis. Applying a magnetic field of 18 T, the α-γ transformation temperature Tinfα-γ/inf for pure iron increased quadratically from 1181 K (a zero field) to 1206 K. With increasing magnetic field strength, the transformation temperature Ainfc1/inf (α-Fe + cementite → α-Fe + γ-Fe) increased linearly from ∼1000 K to ∼1030 K at the rate of 1.4-1.5 K Tsup-1/sup. The transformation temperature Ainfc3/inf (α-Fe + γ-Fe → γ-Fe) for Fe-0.18 wt.%C and Fe-0.38 wt.%C increased quadratically by 27 K under a 18-T field. The Ainfc1/inf and Ainfc3/inf lines shifted to higher temperatures by the magnetic field, resulting in a change in the Fe-Feinf3/infC phase diagram. The results obtained suggest that the transformation temperatures mainly arose because of the Zeeman energy of α-Fe under high magnetic fields.",

keywords = "Differential thermal analysis, Fe-C alloys, High magnetic fields, Phase diagram, Zeeman energy",

author = "Yoshifuru Mitsui and Yuki Ikehara and Kohki Takahashi and Shojiro Kimura and Goro Miyamoto and Tadashi Furuhara and Kazuo Watanabe and Keiichi Koyama",

note = "Funding Information: This work was performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University. The authors are very much indebted to Dr. Oikawa for valuable discussions. This work was supported in part by ISIJ Research Promotion Grant and KAKENHI Grant No. 22360285. Publisher Copyright: {\textcopyright} 2015 Published by Elsevier Inc.",

year = "2015",

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doi = "10.1016/j.jallcom.2015.01.129",

language = "English",

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T1 - Fe-Feinf3/infC binary phase diagram in high magnetic fields

AU - Mitsui, Yoshifuru

AU - Ikehara, Yuki

AU - Takahashi, Kohki

AU - Kimura, Shojiro

AU - Miyamoto, Goro

AU - Furuhara, Tadashi

AU - Watanabe, Kazuo

AU - Koyama, Keiichi

N1 - Funding Information: This work was performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University. The authors are very much indebted to Dr. Oikawa for valuable discussions. This work was supported in part by ISIJ Research Promotion Grant and KAKENHI Grant No. 22360285. Publisher Copyright: © 2015 Published by Elsevier Inc.

PY - 2015/5/25

Y1 - 2015/5/25

N2 - The Fe-Feinf3/infC binary phase diagram under high magnetic fields up to 21 T was investigated by a differential thermal analysis. Applying a magnetic field of 18 T, the α-γ transformation temperature Tinfα-γ/inf for pure iron increased quadratically from 1181 K (a zero field) to 1206 K. With increasing magnetic field strength, the transformation temperature Ainfc1/inf (α-Fe + cementite → α-Fe + γ-Fe) increased linearly from ∼1000 K to ∼1030 K at the rate of 1.4-1.5 K Tsup-1/sup. The transformation temperature Ainfc3/inf (α-Fe + γ-Fe → γ-Fe) for Fe-0.18 wt.%C and Fe-0.38 wt.%C increased quadratically by 27 K under a 18-T field. The Ainfc1/inf and Ainfc3/inf lines shifted to higher temperatures by the magnetic field, resulting in a change in the Fe-Feinf3/infC phase diagram. The results obtained suggest that the transformation temperatures mainly arose because of the Zeeman energy of α-Fe under high magnetic fields.

AB - The Fe-Feinf3/infC binary phase diagram under high magnetic fields up to 21 T was investigated by a differential thermal analysis. Applying a magnetic field of 18 T, the α-γ transformation temperature Tinfα-γ/inf for pure iron increased quadratically from 1181 K (a zero field) to 1206 K. With increasing magnetic field strength, the transformation temperature Ainfc1/inf (α-Fe + cementite → α-Fe + γ-Fe) increased linearly from ∼1000 K to ∼1030 K at the rate of 1.4-1.5 K Tsup-1/sup. The transformation temperature Ainfc3/inf (α-Fe + γ-Fe → γ-Fe) for Fe-0.18 wt.%C and Fe-0.38 wt.%C increased quadratically by 27 K under a 18-T field. The Ainfc1/inf and Ainfc3/inf lines shifted to higher temperatures by the magnetic field, resulting in a change in the Fe-Feinf3/infC phase diagram. The results obtained suggest that the transformation temperatures mainly arose because of the Zeeman energy of α-Fe under high magnetic fields.

KW - Differential thermal analysis

KW - Fe-C alloys

KW - High magnetic fields

KW - Phase diagram

KW - Zeeman energy

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VL - 632

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Fe-Feinf3/infC binary phase diagram in high magnetic fields

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Keywords

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