Journal of Applied Physics

Melting of Fe3C under laser-shock compression to 300 GPa

C C. P. McGuire (Physics Division, Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA) S S. Singh T T. J. Volz S S. M. Clarke (Physics Division, Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA) C C. Vennari (Physics Division, Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA) T T. M. Hutchinson R R. Briggs R R. F. Smith A A. Krygier J J. H. Eggert S S. J. Tracy F F. Miozzi

Abstract

We directly measure melting of shock compressed Fe3C to 300 GPa using in situ x-ray diffraction. We find melting begins at a shock stress state near 150 GPa and is fully liquid by 190(10) GPa. We find no evidence for crystalline Fe7C3, which is the incongruent melting phase observed in static compression experiments. These observations indicate that the equilibrium melting reaction of Fe3C to liquid and Fe7C3 is kinetically inhibited on nanosecond timescales.

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Article Details

Volume / Issue Vol. 140, Issue 3
Published July 21, 2026
ISSN 0021-8979
Publisher American Institute of Physics

Journal Info

Journal of Applied Physics

American Institute of Physics
ISSN: 0021-8979 Physical Sciences

Authors (12)

C

C. P. McGuire

Physics Division, Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA

S

S. Singh

T

T. J. Volz

S

S. M. Clarke

Physics Division, Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA

C

C. Vennari

Physics Division, Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA

T

T. M. Hutchinson

R

R. Briggs

R

R. F. Smith

A

A. Krygier

J

J. H. Eggert

S

S. J. Tracy

F

F. Miozzi

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