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High Pressure - High Temperature Synthesis of Low-Compressibility Cubic C3N4

Published online by Cambridge University Press:  10 February 2011

Jeffrey H. Nguyen ,
Wendel A. Caldwell ,
Laura Robin Benedetti ,
Michael B. Kruger  and
Raymond Jeanloz
Jeffrey H. Nguyen
Affiliation:
Physics and Space Technology Directorate, P. O. Box 808, L-174, Lawrence Livermore National Laboratory, Livermore, CA 94551, nguyen29@llnl.gov Department of Geology and Geophysics, University of California, Berkeley, CA 94720.
Wendel A. Caldwell
Affiliation:
Department of Geology and Geophysics, University of California, Berkeley, CA 94720.
Laura Robin Benedetti
Affiliation:
Department of Physics, University of California, Berkeley, CA 94720.
Michael B. Kruger
Affiliation:
Department of Physics, University of Missouri, Kansas City, MO 64111.
Raymond Jeanloz
Affiliation:
Department of Geology and Geophysics, University of California, Berkeley, CA 94720.
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Abstract

We report the synthesis of a crystalline carbon-nitrogen compound having a zero-pressure bulk modulus of ∼ 249 GPa. Its crystal-structural and compressional properties are in good accord with those predicted theoretically by Teter and Hemley for a cubic C3N4 phase. Experimentally, this phase is synthesized at pressures and temperatures above 18 GPa and 2000 K. It decomposes upon pressure release below 14 GPa, and may offer a route to synthesizing other incompressible carbon nitride phases.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 499: Symposium DD – High Pressure Materials Research , 1997 , 303
Copyright
Copyright © Materials Research Society 1998

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References

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