The effect of temperature, pressure, and sulfur content on viscocity of the Fe-FeS melt

Hidenori Terasaki, Takumi Kato, Satoru Urakawa, Ken ichi Funakoshi, Akio Suzuki, Taku Okada, Makoto Maeda, Jin Sato, Tomoaki Kubo, Shidu Kasai

研究成果: Article査読

54 被引用数 (Scopus)

抄録

The Fe-FeS melt is thought to be the major candidate of the outer core material. Its viscosity is one of the most important physical properties to study the dynamics of the convection in the outer core. We performed the in situ viscosity measurement of the Fe-FeS melt under high pressure using X-ray radiography falling sphere method with a novel sample assembly. Viscosity was measured in the temperature, pressure, and compositional conditions of 1233-1923 K, 1.5-6.9 GPa, and Fe-Fe72S28 (wt%), respectively. The viscosity coefficients obtained by 17 measurements change systematically in the range of 0.008-0.036 Pa s. An activation energy of the viscous flow, Q=30.0±8.6 kJ/mol, and the activation volume, △V=1.5±0.7 X 10-6 m3/mol, are determined as the temperature and pressure dependence, and the viscosity of the Fe72S28 melt is found to be smaller than that of the Fe melt by 15 ± 10%. These tendencies can be well correlated with the structural variation of the Fe-FeS melt.

本文言語English
ページ(範囲)93-101
ページ数9
ジャーナルEarth and Planetary Science Letters
190
1-2
DOI
出版ステータスPublished - 2001 8 18

ASJC Scopus subject areas

  • 地球物理学
  • 地球化学および岩石学
  • 地球惑星科学(その他)
  • 宇宙惑星科学

フィンガープリント

「The effect of temperature, pressure, and sulfur content on viscocity of the Fe-FeS melt」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル