Neutron diffraction study of titanium carbide TiC x prepared from hydrogen-containing titanium powder

Abstract

We show that self-propagating high-temperature synthesis can serve to prepare not only stoichiometric or near-stoichiometric hydrogen-containing titanium carbide TiCx from powdery titanium containing minor hydrogen. The hydrogen percentage in the crystal lattice increases linearly as the TiCx composition progressively deviates from the 1: 1 stoichiometry. A small amount of hydrogen atoms (within 0.38 wt %) in the crystal lattice of nonstoichiometric FCC titanium carbide TiCx appreciably increases the unit cell parameter without having any affect on the concentration dependence trend. This result makes it possible to attest titanium carbide for hydrogen content from the unit cell versus concentration curve.