Effect of different Sn contents on combustion synthesis of Ti 2 SnC was studied using elemental Ti, Sn, C and TiC powders as raw materials in the Ti-Sn-C and Ti-Sn-C-TiC system, in which the molar ratio of Ti/C was set as 2:1. The reaction mechanism for the formation of Ti 2 SnC was also investigated. The results showed that the amount of Ti 2 SnC in combustion products firstly increased with increasing of Sn content (0.6 to 0.8 mol), and then decreased with further increasing of Sn content (1.0 to 1.2 mol). Upon addition of 15 % TiC instead of Ti and C, the optimum addition of Sn decreased to 0.7 mol and a higher purity of Ti 2 SnC was obtained. The Ti 2 SnC powders were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD).

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