Reaction of rhenium and carbon at high pressures and temperatures

Juarez-Arellano, E. A., Winkler, B., Friedrich, A., Wilson, D. J., Koch-Muller, M., Knorr, K., Vogel, S. C., Wall, J. J., Reiche, H., Crichton, W., Ortega-Aviles, M. and Avalos-Borjav, M. (2008) Reaction of rhenium and carbon at high pressures and temperatures Zeitschrift Fur Kristallographie, 223 (8). pp. 492-501. DOI 10.1524/zkri.2008.0054.

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Abstract

A combined X-ray diffraction, EELS and DFT study of the reaction of rhenium with carbon at high-(P, T) conditions up to P(max) = 67 GPa and T(max) = 3800 K is presented. A hexagonal rhenium carbide, ReC(x), was identified as the stable phase at high-(P, T) conditions. A composition of ReC(0.5) is proposed. No evidence for a cubic ReC polymorph with rocksalt structure, as suggested in the literature, or for any other phase was found at the P-T conditions explored. A preliminary P-T rhenium-carbon phase diagram has been derived and properties such as bulk moduli and elastic stiffness coefficients were obtained.

Document Type: Article
Keywords: Carbides High pressures and temperatures Synchrotron radiation Analytical electron microscopy Density functional theory (DFT) X-ray diffraction Powder diffraction structure analysis diamond diffraction system state cell
Research affiliation: Kiel University
Refereed: No
DOI etc.: 10.1524/zkri.2008.0054
ISSN: 0044-2968
Date Deposited: 12 Jan 2012 06:00
Last Modified: 08 Oct 2012 10:14
URI: http://eprints.uni-kiel.de/id/eprint/15845

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