Abstract
Silicon nitride ceramics of the same nominal sialon composition have been sintered under different conditions including atmospheric sintering, overpressure sintering, reaction-bonded (nitrided pressureless sinter), and sinter/HIP cycles. The sintered ceramics, which exhibited dramatic differences in fracture toughness, have been characterized by X-ray diffraction, scanning electron microscopy, analytical transmission electron microscopy, and image analysis techniques. Fracture toughness data have been correlated to the microstructural and chemical analysis of the grain-boundary phases. The microstructure was the strongest influecing factor on the observed fracture-toughness difference.
| Original language | English |
|---|---|
| Pages (from-to) | 603-615 |
| 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 |
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