Effect of Different Ti-Sn Intermetallic Compounds Addition on Synthesis of Ti_2SnC by Self-Propagating High-Temperature Combustion Technique

摘要

The higher purity of Ti_2SnC ternary compounds has been successfully synthesized by self-propagating high-temperature synthesis (SHS) technique with elemental Ti, Sn, C, and some different Ti-Sn intermetallic compounds powders as raw materials. The molar ratio of Ti/Sn/C was set 2:1:1. The results show that the additions of Ti_5Sn_3 and Ti_2Sn play a different role in the synthesis of Ti_2SnC and the optimum addition content are both 20%. Meanwhile, the reaction mechanism for the formation of Ti_2SnC in the system is confirmed that the Ti_5Sn_3 intermetallic compound reacts with TiC to form Ti_2SnC, rather than Ti_2Sn. And Ti_2SnC will partly decompose into Ti_5Sn_3 and TiC at higher temperatures.