Reactions between Ti and Ti3SiC2 in temperature range of 1 273−1 573 K
(1. School of Mechanical Engineering, Shandong University of Technology,
Zibo 255049, China;
2. High-Performance Ceramic Division,
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
Zibo 255049, China;
2. High-Performance Ceramic Division,
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
Abstract: The reactions of Ti3SiC2 and Ti in the temperature range of 1 273−1 573 K under a pressure of 20 MPa were investigated. The results confirm that Ti reacts with Ti3SiC2 above 1 273 K and new phases like TiCx, Ti5Si3 and TiSi2 are identified. The reactions are closely related to temperature and content of Ti3SiC2 in Ti. During the reaction process, Ti3SiC2 decomposes in two different modes. The first is caused by the de-intercalation of Si from it and the TiCx is formed by the remained titanium and carbon; the second is that the carbon is separated from the Ti3SiC2 and reacts with titanium furthermore. The diffusing of silicon is believed to be the determinant ingredient of the reaction.
Key words: Ti3SiC2; Ti; high-temperature reaction