Density measurement of Fe3C liquid using X-ray absorption image up to 10 GPa and effect of light elements on compressibility of liquid iron

H. Terasaki, K. Nishida, Y. Shibazaki, T. Sakamaki, A. Suzuki, E. Ohtani, T. Kikegawa

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Density of liquid iron alloy under high pressure is important to constrain the amount of light elements in the Earth's core. Density measurement of solid and liquid Fe3C was performed using X-ray absorption image technique up to 9.5 GPa and 1973 K. Density of liquid Fe3C increases from 6.94 g/cm3 to 7.38 g/cm3 with a pressure of 3.6-9.5 GPa at 1973 K. The bulk modulus of liquid Fe3C is obtained to be 50 ± 7 GPa at 1973 K. The effect of carbon on the compressibility of liquid iron is similar to that of sulfur, which significantly decreases the bulk modulus of liquid iron. Since carbon dissolution into liquid iron causes reduction of ρ and K0T, carbon could be excluded from the candidates of alloying light elements in the Earth's outer core.

Original languageEnglish
Article numberB06207
JournalJournal of Geophysical Research: Solid Earth
Volume115
Issue number6
DOIs
Publication statusPublished - Jun 2010
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Density measurement of Fe<sub>3</sub>C liquid using X-ray absorption image up to 10 GPa and effect of light elements on compressibility of liquid iron'. Together they form a unique fingerprint.

Cite this