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In Situ Processing and High-Temperature Properties of Ti3Si(Al)C2/SiC Composites.
- Source :
-
International Journal of Applied Ceramic Technology . Jan2006, Vol. 3 Issue 1, p47-54. 8p. 3 Black and White Photographs, 2 Charts, 5 Graphs. - Publication Year :
- 2006
-
Abstract
- Ti3SiC2 has many salient properties including low density, high strength and modulus, damage tolerance at room temperature, good machinablity, and being resistant to thermal shock and oxidation below 1100°C. However, the low hardness and poor oxidation resistance above 1100°C limit the application of this material. The poor oxidation resistance at temperatures above 1100°C was because of the absence of protective layer in the scale and the presence of TiC impurity phase. TiC impurity could be eliminated by adding a small amount of Al to form Ti3Si(Al)C2 solid solutions. Although the high-temperature oxidation resistance was significantly improved for the Ti3Si(Al)C2 solid solutions, the strength at high temperatures was lost. One important way to enhance the high-temperature strength is to incorporate hard ceramic particles like SiC. In this article, we describe the in situ synthesis and simultaneous densification of Ti3Si(Al)C2/SiC composites using Ti, Si, Al, and graphite powders as the initial materials. The effect of SiC content on high-temperature mechanical properties and oxidation resistance were investigated. The mechanisms for the improved high-temperature properties are discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OXIDATION
*TEMPERATURE
*SOLID solutions
*CERAMICS
*GRAPHITE
Subjects
Details
- Language :
- English
- ISSN :
- 1546542X
- Volume :
- 3
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- International Journal of Applied Ceramic Technology
- Publication Type :
- Academic Journal
- Accession number :
- 19344109
- Full Text :
- https://doi.org/10.1111/j.1744-7402.2006.02057.x