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TiN-Si3N4 composite powders were prepared by carbothermal reduction  nitridation using rutile and quartz as raw materials. The influence of  temperature and carbon addition on the phase evolution and microstructure of  the products were investigated. The equilibrium phase diagram of Si-C-N-O and  Ti-C-N-O system at different temperatures under 0.2 MPa nitrogen pressure was  drew. The results show that the optimum parameters for synthesizing TiN-Si3N4  by carbothermal reduction nitridation process are carbon addition of  stoichiometric content, temperature of 1873 K for 4 h and nitrogen pressure  of 0.2 MPa. The produced TiN-Si3N4 in this experiment exist in granular and  hexagonal columnar shape, and the average particle size of the synthesized  powders is 2 ~ 10 μm

Synthesis of TiN-Si3N4 composites from rutile and quartz by carbothermal reduction nitridation