Effect of pressure on the viscosity of Fe-S and Fe-C liquids up to 16 GPa

H. Terasaki; A. Suzuki; E. Ohtani; K. Nishida; T. Sakamaki; K. Funakoshi

doi:10.1029/2006GL027147

Effect of pressure on the viscosity of Fe-S and Fe-C liquids up to 16 GPa

H. Terasaki, A. Suzuki, E. Ohtani, K. Nishida, T. Sakamaki, K. Funakoshi

SCI - Earth Science

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The viscosity of liquid Fe₇₈S₂₂ was measured up to 16 GPa and 1723 K using a high-speed CCD camera system (125 frames/s maximum). In order to prevent a chemical reaction between the sample and a Re viscosity marker sphere, the Re spheres were coated with alumina to a thickness of 1-2 μm. The measured viscosity coefficients were 3.2-8.5 mPa-s and the activation volume was estimated to be 1.46 cm³/mol. The viscosity of liquid Fe₈₆ C₁₄ was also measured up to 4.5 GPa and 1843 K. The viscosity coefficients were 3.8-6.3 mPa-s. There was no large difference in viscosity coefficient and activation volume between the Fe-S and Fe-C eutectic liquids in the range of measurement. Viscosities of Fe-S and Fe-C eutectic liquids are likely to remain low in the planetary interior.

Original language	English
Article number	L22307
Journal	Geophysical Research Letters
Volume	33
Issue number	22
DOIs	https://doi.org/10.1029/2006GL027147
Publication status	Published - 2006 Nov 28

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abstract = "The viscosity of liquid Fe78S22 was measured up to 16 GPa and 1723 K using a high-speed CCD camera system (125 frames/s maximum). In order to prevent a chemical reaction between the sample and a Re viscosity marker sphere, the Re spheres were coated with alumina to a thickness of 1-2 μm. The measured viscosity coefficients were 3.2-8.5 mPa-s and the activation volume was estimated to be 1.46 cm3/mol. The viscosity of liquid Fe86 C14 was also measured up to 4.5 GPa and 1843 K. The viscosity coefficients were 3.8-6.3 mPa-s. There was no large difference in viscosity coefficient and activation volume between the Fe-S and Fe-C eutectic liquids in the range of measurement. Viscosities of Fe-S and Fe-C eutectic liquids are likely to remain low in the planetary interior.",

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T1 - Effect of pressure on the viscosity of Fe-S and Fe-C liquids up to 16 GPa

AU - Terasaki, H.

AU - Suzuki, A.

AU - Ohtani, E.

AU - Nishida, K.

AU - Sakamaki, T.

AU - Funakoshi, K.

PY - 2006/11/28

Y1 - 2006/11/28

N2 - The viscosity of liquid Fe78S22 was measured up to 16 GPa and 1723 K using a high-speed CCD camera system (125 frames/s maximum). In order to prevent a chemical reaction between the sample and a Re viscosity marker sphere, the Re spheres were coated with alumina to a thickness of 1-2 μm. The measured viscosity coefficients were 3.2-8.5 mPa-s and the activation volume was estimated to be 1.46 cm3/mol. The viscosity of liquid Fe86 C14 was also measured up to 4.5 GPa and 1843 K. The viscosity coefficients were 3.8-6.3 mPa-s. There was no large difference in viscosity coefficient and activation volume between the Fe-S and Fe-C eutectic liquids in the range of measurement. Viscosities of Fe-S and Fe-C eutectic liquids are likely to remain low in the planetary interior.

AB - The viscosity of liquid Fe78S22 was measured up to 16 GPa and 1723 K using a high-speed CCD camera system (125 frames/s maximum). In order to prevent a chemical reaction between the sample and a Re viscosity marker sphere, the Re spheres were coated with alumina to a thickness of 1-2 μm. The measured viscosity coefficients were 3.2-8.5 mPa-s and the activation volume was estimated to be 1.46 cm3/mol. The viscosity of liquid Fe86 C14 was also measured up to 4.5 GPa and 1843 K. The viscosity coefficients were 3.8-6.3 mPa-s. There was no large difference in viscosity coefficient and activation volume between the Fe-S and Fe-C eutectic liquids in the range of measurement. Viscosities of Fe-S and Fe-C eutectic liquids are likely to remain low in the planetary interior.

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Effect of pressure on the viscosity of Fe-S and Fe-C liquids up to 16 GPa

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