Abstract
Fine-grained B4C-SiC/C composites were prepared by using ball-milling dispersion process. The oxidation behaviors of both fine-grained and coarse-grained B4C-SiC/C composites at temperatures of up to 1400°C were analyzed by the differential thermal analysis technique, and the surface morphology of the composites after isothermal oxidation at 800°C, 1200°C and 1400°C was examined by scanning electron microscopy (SEM). The results showed that fine-grained B4C-SiC/C composites had excellent oxidation resistance with self-healing properties during 800-1400°C due to fast oxidation rate of fine-grained carbide dispersing uniformly on the surface of composite and rapid formation of thin and smooth borosilicate glass film covering the surface of composite.
| Original language | English |
|---|---|
| Pages (from-to) | 287-292 |
| Number of pages | 6 |
| Journal | Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research |
| Volume | 17 |
| Issue number | 3 |
| State | Published - Jun 2003 |
Keywords
- Ball-milling dispersion
- Composite
- Oxidation
- Scanning electron microscopy
- Thermal analysis