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Preparation of 3D orthogonal woven C–SiC composite and its characterization for thermo-mechanical properties
- Source :
-
Materials Science & Engineering: A . Jul2011, Vol. 528 Issue 19/20, p6210-6216. 7p. - Publication Year :
- 2011
-
Abstract
- Abstract: 3D-orthogonal-woven-C–SiC composite blocks were fabricated using liquid–silicon-infiltration and were characterized for thermal and mechanical properties. Coefficient of thermal expansion (CTE) and thermal-diffusivity of the blocks were determined in the three mutually perpendicular directions. CTE was found to lie in the range −0.5×10−6 to 0.9×10−6/°C over the temperature range 25–1050°C while thermal diffusivity was found to be in the range 37.0–7.0mm2/s over the temperature range 25–1200°C. The composites were subjected to sudden heating at a heat flux of 0.9W/mm2 for 20s and cooling by a blast of air, upto 5 times. Three point bend test of the specimens was carried out. After five thermal shocks the composites retained about 59% of the initial strength (190MPa); after each thermal shock, the composite retained 85–90% of the previous strength. The composites showed excellent resistance to thermal shock and chemical erosion necessary for re-usable aerospace applications. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 528
- Issue :
- 19/20
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 61175834
- Full Text :
- https://doi.org/10.1016/j.msea.2011.04.063