Paper Title:
Ternary Ceramics Ti3SiC2: Combustion Synthesis and the Reaction Mechanism
  Abstract

In this study, Ti3SiC2 was successfully synthesized by the combustion of green samples with a composition formula: (3-x)Ti/Si/(2-x)C/xTiC, where x ranged from 1.0 to 1.8. First, the Ti3SiC2 yield monotonically increased with x, but the maximal yield was less than 50%. The most important factor to increase the Ti3SiC2 yield was found to be the post-combustion heating. The yield dramatically increased to about 90% when a 150-second post-combustion heating time was provided. Furthermore, the yield was proportional to the post-heating time, and linearly increased with the amount of applied post-combustion heating energy. Next, excess Si in the starting reactant powders can further increase the extent of Ti3SiC2. When the mole of Si increased from 1.0 to 1.1, the resulted yield was more than 99%. For the study of reaction mechanism, analyses of sequential layers of quenched samples resulted in the following proposed mechanism. First, TiC, TiSi2, Ti5Si3 were formed from the reactions of Ti, Si and C powders. Next, the eutectic liquids (Ti-Ti5Si3 and Si-TiSi2) covered the TiC particles at the elevated temperature. In the final stage, product Ti3SiC2 was resulted from heating the eutectics and TiC. It is noted that the last two steps required large energy, indicating the post-combustion heating was crucial to produce high-purity Ti3SiC2 product.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
1651-1656
DOI
10.4028/www.scientific.net/MSF.475-479.1651
Citation
T. Y. Huang, C. C. Chen, "Ternary Ceramics Ti3SiC2: Combustion Synthesis and the Reaction Mechanism", Materials Science Forum, Vols. 475-479, pp. 1651-1656, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: M.A.F. Ramalho, Ana Cristina Figueiredo de Melo Costa, Lucianna Gama, Ruth Herta Goldsmith Aliaga Kiminami, E.P. Hernandez, Daniel R. Cornejo, S.M. Rezende
Abstract:Ultrafine magnetic nickel ferrite particles have a significant potential for use in many applications such as magnetic recording media,...
637
Authors: Peng Lin Zhang, Tian Dong Xia, Guo Dong Zhang, Li Jing Yan
Abstract:The combustion process of Mg-TiO2 system was preliminarily investigated from three aspects of thermodynamics, reaction kinetics and the...
1086
Authors: Ying Zhang, Ai Chen, Hai Rong Wang, Ze Song Li, Ying Ping Shen
Abstract:The present article reports the results of studies related to the synthesis of nanocrystalline ceria powder by combustion process using salt...
5
Authors: Jing Xu, Qing Hua Chen, Xin Ping Liu, Bao Quan Huang, Qing Rong Qian
Chapter 2: Environmental Materials and Processes
Abstract:A nanoscale ceria-doped calcia solid solution has been synthesized by controled self-combustion method. The difference in crystal structure...
547
Authors: Zhuo Li, Jiu Xin Jiang, Yan Ping Wei, Ming Yan, Yan Lin Chen, Ying Chang
Chapter 1: Materials Engineering and Materials Processing
Abstract:A very simple synthesis method of AlN-SiC solid solution powder, i.e. self-combustion of Al, Si3N4 and C mixture in the...
39