Combustion synthesis of TiN_xC_1-x powders with ultra fine particle size by using titanium oxide as dilution

In present works, the low cost TiO₂ powders were partially introduced to raw mixture as playing roles of both reactant and dilution. The experimental results showed that increasing the ratio of TiO₂ to titanium powders up to 70wt%, the combustion synthesis reaction could still proceed by self-sustained mode. Single phase of TiN_xC_1-x with ultra fine particle size could be prepared by using TiO₂ as dilution. Influences of TiO₂ addition on phase formation and microstructure of product were also investigated. It was found that the combustion temperature and as-synthesized TiN_xC_1-x particle size decreased as increasing the amount of TiO₂ addition.