Thermodynamic and lattice parameter calculation of TiCx produced from Al-Ti-C powders by laser igniting self-propagating high-temperature synthesis

TiCx has been formed by self-propagating high-temperature synthesis (SHS) from elemental powder mixtures with a range of C/Ti ratios. The combusting behavior of the powder mixtures was investigated. The effect of the processing variables on the lattice parameter and the composition of TiC were examined. The results show that lattice parameters of TiCx increase with the increase of C/Ti ratio. The variation of Gibbs free energy in Al-Ti-C system was studied based on the thermodynamics theory. The results show that TiC and Al3Ti phases are easier to form than Al4C3 phase.