Reaction of rhenium and carbon at high pressures and temperatures

被引:43
|
作者
Juarez-Arellano, Erick A. [1 ]
Winkler, Bjoern [1 ]
Friedrich, Alexandra [1 ]
Wilson, Dan J. [1 ]
Koch-Mueller, Monika [2 ]
Knorr, Karsten [1 ,3 ]
Vogel, Sven C. [4 ]
Wall, James J. [4 ]
Reiche, Helmut [4 ]
Crichton, Wilson [5 ]
Ortega-Aviles, Mayahuel [6 ]
Avalos-Borjav, Miguel [7 ]
机构
[1] Univ Frankfurt, Inst Geowissensch, D-60438 Frankfurt, Germany
[2] Geoforschungszentrum Potsdam, Sekt 4 1, D-14473 Potsdam, Germany
[3] Univ Kiel, Inst Geowissensch Mineral Kristallog, D-24098 Kiel, Germany
[4] Los Alamos Natl Lab, Lujan Ctr, Los Alamos, NM 87545 USA
[5] ESRF, F-38043 Grenoble, France
[6] LMEUAR, IMP, Mexico City 07730, DF, Mexico
[7] Univ Nacl Autonoma Mexico, CCMC, Ensenada 2681, Baja California, Mexico
来源
ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 2008年 / 223卷 / 08期
关键词
Carbides; High pressures and temperatures; Synchrotron radiation; Analytical electron microscopy; Density functional theory (DFT); X-ray diffraction; Powder diffraction structure analysis;
D O I
10.1524/zkri.2008.0054
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
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, ReCx, was identified as the stable phase at high-(P, T) conditions. A composition of ReC0.5 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.
引用
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页码:492 / 501
页数:10
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