Abstract
The carbon nanotubes (CNTs) were in-situ grown on carbon fiber felts and the hybrid felts were densified by chemical vapor infiltration (CVI) to prepare CNTs-C/C composites. The effects of catalyst content on the growth of CNTs and the effects of CNT content on the flexural properties of CNTs-C/C composites were investigated. The results show that catalyst content has a great influence on the yield of CNTs. More CNTs were obtained with the catalyst content increasing. The catalysts used for CNT growing deteriorate the flexural properties of C/C composites. The CNTs changes the infiltration behaviors of pyrocarbons and induces the formation of abundant small-sized spherical or cone-shaped pyrocarbons, which inhibits the formation of annular cracks in pyrocarbon matrix. The CNTs with a suitable content can increase the flexural strength and modulus and improve the fracture behavior of C/C composites.
| Original language | English |
|---|---|
| Pages (from-to) | 7-13 |
| Number of pages | 7 |
| Journal | Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica |
| Volume | 30 |
| Issue number | 6 |
| State | Published - Dec 2013 |
Keywords
- Carbon nanotube
- Carbon/carbon composite
- Flexural property
- In-situ growth
- Microstructure