Abstract
Mechanical properties of CVI-produced SiC/SiC composites were studied. The composites, with simple carbon interphase and C/SiC multi-layered interphase/matrix, were fabricated by isothermal forced-flow CVI method. Hi-Nicalon and Tyranno-SA fibers were employed as the reinforcements. Flexural testing and electron microscopy were performed on the as-fabricated composites. The effect of interphases was studied by scanning electron microscopy. The Hi-Nicalon and Tyranno-SA composites exhibited dissimilar fracture behavior; the Tyranno-SA composite showed higher proportional limit and smaller elongation. In the multilayered interphase composites, though debonding occurred mostly at the fiber surface, matrix crack deflection at the interlayers was observed. Macroscopic fracture behavior was not significantly different between single pyrocarbon and multilayered interphase Hi-Nicalon composites.
| Original language | English |
|---|---|
| Pages (from-to) | 399-406 |
| Number of pages | 8 |
| Journal | Ceramic Engineering and Science Proceedings |
| Volume | 21 |
| Issue number | 3 |
| State | Published - 2000 |
| Externally published | Yes |
| Event | 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures:A - Cocoa Beach, FL, USA Duration: Jan 23 2000 → Jan 28 2000 |