Synthesis of Ti3SiC2 from powder blend of Ti, Si and TiC

被引：0
|
作者：
Hashimoto, Hitoshi [1 ]
Sun, Zheng Ming [1 ]
Inoue, Yosuke [2 ]
Tada, Shuji [1 ]
机构：
[1] Material Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan
[2] Yagusa-cho, Toyota, 470-0392, Japan
来源：
Journal of Alloys and Compounds | 2006年 / 426卷 / 1-2期
关键词：
Titanium silicon carbide Ti3SiC2 was synthesized from a powder blend of Ti; Si and TiC at a molar ratio of Ti:Si:TiC = 2:2:3. The powder blend was pressed and shaped into a cylinder and then sintered at various temperatures in vacuum. X-ray diffraction analysis was conducted on the cylinders sintered at various temperatures. Results of the XRD analysis revealed that Ti5Si3; the most thermodynamically stable phase in Ti-Si system; was preferentially formed by the reaction between Ti and Si powders followed by the formation of TiSi2 from remaining Ti and Si powders in a relatively low temperature range. These silicides reacted with TiC to form Ti3SiC2 at higher temperatures. The final phases in the cylinders sintered at temperatures over 1729 K were Ti3SiC2 and Ti5Si3; which well agrees with those estimated by a Ti-Si-C phase diagram. On the other hand; final phases in disks sintered under pressures of 14 MPa or more by using a carbon mold were found to be Ti3SiC2 and TiC; which suggests the equilibrium changes with the pressure. © 2006 Elsevier B.V. All rights reserved;
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页码：263 / 267
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