Original Paper

Physics and Chemistry of Minerals

, Volume 38, Issue 3, pp 203-214

First online:

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

  • O. NaryginaAffiliated withBayerisches Geoinstitut, Universität BayreuthSUPA, School of Physics and Centre for Science at Extreme Conditions, The University of Edinburgh Email author 
  • , L. S. DubrovinskyAffiliated withBayerisches Geoinstitut, Universität Bayreuth
  • , N. MiyajimaAffiliated withBayerisches Geoinstitut, Universität Bayreuth
  • , C. A. McCammonAffiliated withBayerisches Geoinstitut, Universität Bayreuth
  • , I. Yu. KantorAffiliated withBayerisches Geoinstitut, Universität BayreuthEuropean Synchrotron Radiation Facility
  • , M. MezouarAffiliated withEuropean Synchrotron Radiation Facility
  • , V. B. PrakapenkaAffiliated withCenter for Advanced Radiation Sources, University of Chicago
  • , N. A. DubrovinskaiaAffiliated withBayerisches Geoinstitut, Universität BayreuthInstitut für Geowissenschaften, Universität Heidelberg
  • , V. DmitrievAffiliated withEuropean Synchrotron Radiation Facility

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We performed comparative study of phase relations in Fe1−x Ni x (0.10 ≤ x ≤ 0.22 atomic fraction) and Fe0.90Ni0.10−x C x (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.


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