Structure and Density of Fe‐C Liquid Alloys Under High Pressure Journal Article uri icon

Overview

abstract

  • AbstractThe density and structure of liquid Fe‐C alloys have been measured up to 58 GPa and 3,200 K by in situ X‐ray diffraction using a Paris‐Edinburgh press and laser‐heated diamond anvil cell. Study of the pressure evolution of the local structure inferred by X‐ray diffraction measurements is important to understand the compression mechanism of the liquid. Obtained data show that the degree of compression is greater for the first coordination sphere than the second and third coordination spheres. The extrapolation of the measured density suggests that carbon cannot be the only light element alloyed to iron in the Earth's core, as 8–16 at % C (1.8–3.7 wt % C) would be necessary to explain the density deficit of the outer core relative to pure Fe. This concentration is too high to account for outer core velocity. The presence of other light elements (e.g., O, Si, S, and H) is thus required.

publication date

  • October 1, 2017

has restriction

  • bronze

Date in CU Experts

  • July 23, 2019 3:02 AM

Full Author List

  • Morard G; Nakajima Y; Andrault D; Antonangeli D; Auzende AL; Boulard E; Cervera S; Clark AN; Lord OT; Siebert J

author count

  • 13

Other Profiles

International Standard Serial Number (ISSN)

  • 2169-9313

Electronic International Standard Serial Number (EISSN)

  • 2169-9356

Additional Document Info

start page

  • 7813

end page

  • 7823

volume

  • 122

issue

  • 10