Low temperature combustion synthesis of TiC powder induced by PTFE

被引：0

作者：

Yu, Yin-Hu ^{[1
]}

Wang, Tao ^{[1
]}

Zhang, Hong-Min ^{[1
]}

Zhang, Du-Bao ^{[1
]}

Pan, Jian-Feng ^{[1
]}

机构：

[1] College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Wuji Cailiao Xuebao/Journal of Inorganic Materials | 2015年 / 30卷 / 03期

关键词：

Combustion synthesis; PTFE; Reaction mechanism; TiC;

D O I：

10.15541/jim20140307

中图分类号：

学科分类号：

摘要：

TiC powders were prepared at low temperature from the Ti-C system with polytetrafluoroethylene (PTFE) as a chemical activator. The reaction temperature, phase composition and morphology were determined via differential scanning calorimetry (DSC), X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) to explore the reaction mechanism, respectively. The FESEM result shows that TiC powders with average particle size less than 100 nm are synthesized via low-temperature combustion synthesis at 530 ℃ by adding 3wt% PTFE into Ti-C system. Based on the most intensive diffraction peak (200) of the XRD pattern, the crystallite size of prepared TiC powders is calculated to be about 81 nm by the Scherrer formula, which is close to the average particle size observed from the FESEM image. It indicates that TiC particles consist of a single crystal as the result of fast, low-temperature, solid-state synthesis process. According to DSC results, the combustion synthesis mainly includes two reaction processes. Firstly, the initial reaction between titanium and PTFE particles releases a great amount of heat, and subsequently, the heat induced combustion reaction between titanium and carbon particles. ©, 2015, Science Press. All right reserved.

引用

页码：272 / 276

页数：4

共 23 条

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