Thermal equation of state of TiC: A synchrotron x-ray diffraction study
- LANSCE Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Mineral Physics Institute, State University of New York, Stony Brook, New York 11794 (United States)
- Department of Physics, University of Science and Technology of China, Hefei 230026 (China)
- National Lab for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100080 (China)
The pressure-volume-temperature measurements were carried out for titanium carbide (TiC) at pressures and temperatures up to 8.1 GPa and 1273 K using energy-dispersive synchrotron x-ray diffraction. Thermoelastic parameters were derived for TiC based on a modified high-temperature Birch-Murnaghan equation of state and a thermal pressure approach. With the pressure derivative of the bulk modulus, K{sub 0}{sup '}, fixed at 4.0, we obtain: the ambient bulk modulus K{sub 0}=268(6) GPa, which is comparable to previously reported value; temperature derivative of bulk modulus at constant pressure ({partial_derivative}K{sub T}/{partial_derivative}T){sub P}=-0.026(9) GPa K{sup -1}, volumetric thermal expansivity {alpha}{sub T}(K{sup -1})=a+bT with a=1.62(12)x10{sup -5} K{sup -1} and b=1.07(17)x10{sup -8} K{sup -2}, pressure derivative of thermal expansion ({partial_derivative}{alpha}/{partial_derivative}P){sub T}=(-3.62{+-}1.14)x10{sup -7} GPa{sup -1} K{sup -1}, and temperature derivative of bulk modulus at constant volume ({partial_derivative}K{sub T}/{partial_derivative}T){sub V}=-0.015(8) GPa K{sup -1}. These results provide fundamental thermophysical properties for TiC for the first time and are important to theoretical and computational modeling of transition metal carbides.
- OSTI ID:
- 21476288
- Journal Information:
- Journal of Applied Physics, Vol. 107, Issue 11; Other Information: DOI: 10.1063/1.3436571; (c) 2010 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CERAMICS
COMPUTERIZED SIMULATION
EQUATIONS OF STATE
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
THERMAL EXPANSION
THERMOELASTICITY
TITANIUM CARBIDES
X-RAY DIFFRACTION
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELASTICITY
EQUATIONS
EXPANSION
MECHANICAL PROPERTIES
PRESSURE RANGE
SCATTERING
SIMULATION
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS