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

被引：29
|
作者：
Terasaki, H. [1 ]
Suzuki, A.
Ohtani, E.
Nishida, K.
Sakamaki, T.
Funakoshi, K.
机构：
[1] Tohoku Univ, Dept Mineral Petrol & Econ Geol, Aoba Ku, Sendai, Miyagi 9808578, Japan
[2] Japan Synchrotron Radiat Res inst, Sayo 6795198, Japan
来源：
GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 22期
关键词：
D O I：
10.1029/2006GL027147
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
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 mu m. The measured viscosity coefficients were 3.2 - 8.5 mPa-s and the activation volume was estimated to be 1.46 cm(3)/mol. The viscosity of liquid Fe86C14 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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页数：4
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