Lattice dynamics of TiC

Abstract

The phonon dispersion curves or TiC0.95 at room temperature have been measured by inelastic neutron scattering in the main symmetry directions. Additional measurements have been performed on a sample of lower carbon content, i.e. TiC0.89. The measured phonons are well reproduced within the framework of a shell model with free electron screening. The authors results confirm the correlation between the lattice dynamics and the formal valence of the metal atom found on other transition metal carbides.