Effects of different Sn contents on formation of TiSnC by self-propagating high-temperature synthesis method in Ti-Sn-C and Ti-Sn-C-TiC systems.

Effect of different Sn contents on combustion synthesis of TiSnC 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 TiSnC was also investigated. The results showed that the amount of TiSnC 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 TiSnC was obtained. The TiSnC powders were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). [ABSTRACT FROM AUTHOR]