Abstract
Graphite powder reinforced pyrocarbon (G/C) was prepared by thermal gradient chemical vapor infiltration technology. The microstructures and basic properties of the G/C were investigated by polarized light microscopy, SEM, electrical and mechanical tests. It is found that pyrocarbon enwraps the graphite powder particles and fills the pores between them effectively. The G/C is isotropic, has a density of 1.85g/cm3, and has a higher volume resistivity (148.4μΩ·m) than graphite and the other C/C composites. It has excellent mechanical properties with a flexural strength of 50MPa and a compressive strength of 120MPa, twice those of pure graphite. The compressive strength of the G/C is similar to, and the flexural strength is lower than, those of carbon felt/pyrocarbon composites.
| Original language | English |
|---|---|
| Pages (from-to) | 12-16 |
| Number of pages | 5 |
| Journal | Xinxing Tan Cailiao/New Carbon Materials |
| Volume | 22 |
| Issue number | 1 |
| State | Published - Mar 2007 |
Keywords
- Carbon/carbon composites
- Chemical vapor infiltration
- Graphite powder
- Pyrocarbon