Pressure effect on the hydrogen vibrations in γ-TiH and γ-ZrH

Abstract

The inelastic neutron scattering spectra of γ -TiH and γ -ZrH were measured under high hydrostatic pressure. It was found that the energies of the hydrogen optical bands and bound multiphonon features (biphonons and triphonons) increased under pressure in linear proportion to their values at ambient pressure with the scaling factors of 1.02 for γ -TiH at P = 15 kbar and 1.03 for γ -ZrH at P = 17.5 kbar. The observed behaviour of the hydrogen-related spectral features is indicative of a uniform increase of the atomic force constants and the anharmonicity parameters in the model Hamiltonians representing the strength of two-and three-phonon interactions under pressure.

Scanning electron microscopy, X-ray diffraction and thermal analysis study of the TiH2 foaming agent

“…Titanium hydride can be used as a catalyst in the reversible dehydrogenation of other hydrides and carbon nanotubes [1][2][3]. It is also used as a catalyst in the preparation of titanium compounds [1,4,5], as a source of pure hydrogen [1], in the manufacturing of ceramic and glass seals from a mixture of active metal titanium or titanium hydride in powder form and titanium coatings [1].…”