Viscosity change and structural transition of molten Fe at 5 GPa

Hidenori Terasaki, Takumi Kato, Satoru Urakawa, K. Funakoshi, K. Sato, A. Suzuki, T. Okada

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The in situ viscosity measurements of the pure molten Fe under high pressures were made by falling sphere X-ray radiography method. Viscosity coefficients at about 2000 K were 15-24 mPa s at 2.7-5.0 GPa, and 4-9 mPa s at 5.0-7.0 GPa. Drastic decrease was found at around 5 GPa, at which stable solid phase below the melting temperatures change from delta (bcc) to gamma (fcc) phases. The observation indicates the possibility that the structural change in the molten Fe occurs in a narrow pressure interval (1 GPa) at the similar condition with the phase transformation in the solid.

Original languageEnglish
JournalGeophysical Research Letters
Volume29
Issue number8
Publication statusPublished - Apr 15 2002

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viscosity
falling spheres
radiography
structural change
phase transformations
solid phases
melting
intervals
coefficients
x rays
temperature
in situ
method

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Terasaki, H., Kato, T., Urakawa, S., Funakoshi, K., Sato, K., Suzuki, A., & Okada, T. (2002). Viscosity change and structural transition of molten Fe at 5 GPa. Geophysical Research Letters, 29(8).

Viscosity change and structural transition of molten Fe at 5 GPa. / Terasaki, Hidenori; Kato, Takumi; Urakawa, Satoru; Funakoshi, K.; Sato, K.; Suzuki, A.; Okada, T.

In: Geophysical Research Letters, Vol. 29, No. 8, 15.04.2002.

Research output: Contribution to journalArticle

Terasaki, H, Kato, T, Urakawa, S, Funakoshi, K, Sato, K, Suzuki, A & Okada, T 2002, 'Viscosity change and structural transition of molten Fe at 5 GPa', Geophysical Research Letters, vol. 29, no. 8.
Terasaki H, Kato T, Urakawa S, Funakoshi K, Sato K, Suzuki A et al. Viscosity change and structural transition of molten Fe at 5 GPa. Geophysical Research Letters. 2002 Apr 15;29(8).
Terasaki, Hidenori ; Kato, Takumi ; Urakawa, Satoru ; Funakoshi, K. ; Sato, K. ; Suzuki, A. ; Okada, T. / Viscosity change and structural transition of molten Fe at 5 GPa. In: Geophysical Research Letters. 2002 ; Vol. 29, No. 8.
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