Combustion Synthesis of TiN_xC_(1-x) Powders with Ultra Fine Particle Size by Using Titanium Oxide as Dilution

摘要

In present works, the low cost TiO_2 powders were partially introduced to raw mixture as playing roles of both reactant and dilution. The experimental results showed that increasing the ratio of TiO_2 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 TiO_2 as dilution. Influences of TiO_2 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 TiO_2 addition.