Abstract
Alumina and silicon nitride matrices reinforced with SiC whiskers were chevron notched and fractured at room temperature, 750°C, 1000°C, and 1250°C in 4-pt. bending. Toughness and surface microstructures were evaluated and investigated. SEM micrographs revealed that the extent of whisker pullout appeared to be dependent on the fracture temperature and the relative crack propagation rate, while intergranular and transgranular failures of the matrix were a function of fracture temperature only. Fracture microstructures were qualitatively related to the characteristic composite toughness.
| Original language | English |
|---|---|
| Pages (from-to) | 721-733 |
| Number of pages | 13 |
| Journal | Ceramic Engineering and Science Proceedings |
| Volume | 11 |
| Issue number | 7 -8 pt 1 |
| State | Published - Jul 1990 |
| Externally published | Yes |
| Event | Fourteenth Annual Conference on Composites and Advanced Ceramic Materials - Cocoa Beach, FL, USA Duration: Jan 14 1990 → Jan 17 1990 |