Abstract
C/SiC composites were fabricated by lower pressure chemical vapor infiltration. Effect of two kinds of heating method (electrical resistance heating at 50 Hz and induction heating at 2500Hz) on deposition mechanism of SiC, the densification, microstructure and properties of C/SiC composites was investigated. The difference of deposition mechanisms of SiC between the different heating methods was indicated by deposition unit. Deposition unit is high temperature molten-droplet for electrical resistance heating. However it is SiC solid agglomerate for induction heating. It is difficult for SiC composites to densify for induction heating because it is difficult for SiC solid agglomerate to infiltrate into fiber bundle. But it is easy for high temperature molten-droplet to infiltrated into fiber bundle. C/SiC composites infiltrated under two kinds of different heating method have different microstructure due to different SiC deposition mechanism. This led to C/SiC composites to have higher density, bending strength, fracture toughness and work of fracture for electrical resistance heating as compared with induction heating.
| Original language | English |
|---|---|
| Pages (from-to) | 41-45 |
| Number of pages | 5 |
| Journal | Hangkong Cailiao Xuebao/Journal of Aeronautical Materials |
| Volume | 22 |
| Issue number | 3 |
| State | Published - Sep 2002 |
Keywords
- C/SiC composite
- Deposition mechanism
- Heating method
- Mechanical property
- Microstructure