Phase relations in Fe-Ni-C system at high pressures and temperatures

O. Narygina, L. S. Dubrovinsky, N. Miyajima, C. A. McCammon, I. Yu. Kantor, M. Mezouar, V. B. Prakapenka, N. A. Dubrovinskaia, V. Dmitriev

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We performed comparative study of phase relations in Fe1-xNix (0.10 <= x <= 0.22 atomic fraction) and Fe0.90Ni0.10-xCx (0.1 <= x <= 0.5 atomic fraction) systems at pressures to 45 GPa and temperatures to 2,600 K using laser-heated diamond anvil cell and large-volume press (LVP) techniques. We show that laser heating of Fe, Ni alloys in DAC even to relatively low temperatures can lead to the contamination of the sample with the carbon coming from diamond anvils, which results in the decomposition of the alloy into iron- and nickel-rich phases. Based on the results of LVP experiments with Fe-Ni-C system (at pressures up to 20 GPa and temperatures to 2,300 K) we demonstrate decrease of carbon solubility in Fe, Ni alloy with pressure.

Original languageEnglish
Pages (from-to)203-214
Number of pages12
JournalPhysics and Chemistry of Minerals
Issue number3
Publication statusPublished - Mar 2011


  • LH-DAC
  • Large-volume press
  • Martensitic transformation
  • Carbon solubility in Fe,Ni alloy


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