Synthesis and Reaction Mechanism of High-Purity Ti3SiC2

Different raw material system were adopted to synthesize high purity Ti3SiC2 without any reaction additives by vaccum solid reaction. The effect of synthesis conditions on powder′s purity was studied by X-ray diffractometer and the reaction process and mechanisms were also discussed. The results show that high-purity Ti3SiC2 could be synthesized by taking TiH2, Si and TiC powders as raw materials, and the purity of Ti3SiC2 was all higher than 90% and the highest purity could reach to 98.64%. The higher purity Ti3SiC2 could be synthesize at 1 400 ℃ when the ratio of TiH2, Si and TiC powders was 1∶1.25∶1.9, and the Ti3SiC2 started to decomposed at 1 500 ℃.