https://doi.org/10.1051/epjap/2013130313
Ab initio calculations of structure and thermodynamic properties of tetragonal-TiH2 under high temperatures and pressures
Institute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900, P.R. China
a e-mail: xiankunliu@gmail.com
Received:
1
July
2013
Accepted:
22
August
2013
Published online:
3
October
2013
The structural and thermodynamic properties of tetragonal-TiH2 under high temperatures and pressures are investigated by Ab initio calculations based on pseudo-potential plane-wave density functional theory method within using the generalized gradient approximation (GGA) and quasi-harmonic Debye model. Some ground state properties such as lattice constants, bulk modulus and elastic constants are good agreement with the available experimental results and other theoretical data. Through the quasiharmonic Debye model, in which the phononic effects are considered, the thermodynamic properties of tetragonal-TiH2 such as thermal expansion coefficient, Debye temperature, heat capacity and Grüneisen parameters dependence of temperature and pressure in the range of 0–1000 K and 0–10 GPa are also presented, respectively.
© EDP Sciences, 2013
