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Matrix structure evolution and thermo-mechanical properties of carbon fiber-reinforced Al2O3[sbnd]SiC[sbnd]C castable composites.
- Source :
-
Materials Research Bulletin . Jan2015, Vol. 61, p201-206. 6p. - Publication Year :
- 2015
-
Abstract
- The spalling and corrosion during the thermal cycles are the main causes of the damages observed in Al 2 O 3 SiC C castable composites that are used in molten-iron system. Using the catalyst of nano Ni and ball pitch in the matrix, Al 2 O 3 SiC C castable composites were prepared with the anti-oxidant addition of silicon. The results indicate that the high temperature of the Al 2 O 3 SiC C castable composites can be increased by above 42%, and the thermal shock resistance can be enhanced by above 20% because the ball pitch is carbonized and releases C x H y vapor, which can be pyrolized to carbon atoms and subsequently deposited into carbon fibers under the catalyst action. The starting temperature of carbon fiber growth is approximately 900 °C, and their diameter and aspect ratio can increase with the rising temperature. The in-situ generation of carbon fibers in Al 2 O 3 SiC C castable composites can significantly improve the fibers’ thermo-mechanical properties. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00255408
- Volume :
- 61
- Database :
- Academic Search Index
- Journal :
- Materials Research Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 99920100
- Full Text :
- https://doi.org/10.1016/j.materresbull.2014.10.022