Reactions between Ti and Ti_3SiC_2 in temperature range of 1 273-1573K

• 作 者: 谷万里 周延春
• 机 构: School of Mechanical Engineering Shandong University of Technology,High-Performance Ceramic Division
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2004年期
• 关键词: graphite decomposed titanium powders pressed implies disappear selecting anneale

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.

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. The diffusing of silicon is believed to be the determinant of the reaction.