Thermal equation of state of TiC: A synchrotron x-ray diffraction study

Journal Article · Tue Jun 15 04:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3436571· OSTI ID:21476288

Xiaohui, Yu ^[1]; Zhijun, Lin; Jianzhong, Zhang; Yusheng, Zhao ^[1]; Liping, Wang ^[2]; Zejun, Ding ^[3]; Changqing, Jin ^[4]

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1. LANSCE Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Mineral Physics Institute, State University of New York, Stony Brook, New York 11794 (United States)
3. Department of Physics, University of Science and Technology of China, Hefei 230026 (China)
4. 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, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 107; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBIDES
CARBON COMPOUNDS
CERAMICS
COHERENT SCATTERING
COMPUTERIZED SIMULATION
DIFFRACTION
ELASTICITY
EQUATIONS
EQUATIONS OF STATE
EXPANSION
MECHANICAL PROPERTIES
PRESSURE DEPENDENCE
PRESSURE RANGE
PRESSURE RANGE GIGA PA
SCATTERING
SIMULATION
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
THERMAL EXPANSION
THERMOELASTICITY
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION