Abstract
Silicon carbide textile composites reinforced with continuous carbon and silicon carbide fiber were fabricated by chemical vapor infiltration. The densities of C/SiC composites and SiC/SiC composites after the 30 h infiltration are 2.1 g·cm-3 and 2.5 g·cm-3 respectively. The flexural strength values of C/SiC composites and SiC/SiC composites are 450 MPa and 860 MPa respectively, which are not reduced as the temperature is increased from room temperature to 1600°C. Accordingly, the fracture toughness values are 20 MPa·m1/2 and 41.5 MPa·m1/2, the fracture work values are 10 kJ·m-2 and 28.1 kJ·m-2, and the dynamic impact fracture toughness values are 62.0 kJ·m-2 and 36.0 kJ·m-2, respectively. After thermal shock tests between 300°C and 1300°C for 50 times, the flexural strength is retained by 96.4%. It is indicated that the thermal shock is not a controlling factor for the failure of C/SiC and SiC/SiC materials. Compared with C/SiC composites, SiC/SiC composites exhibit superior oxidation resistance. Especially, both C/SiC and SiC/SiC thruster chambers have successfully passed the test of rocket engine.
Original language | English |
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Pages (from-to) | 184-188 |
Number of pages | 5 |
Journal | Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society |
Volume | 30 |
Issue number | 2 |
State | Published - Apr 2002 |
Keywords
- Carbon/silicon carbide composites
- Ceramic matrix composites
- Chemical vapor infiltration
- Silicon carbide/silicon carbide composites