The R-curve for Si 3N 4-40 wt% TiN composites was estimated by the indentation-strength method and compared to that of monolithic Si 3N 4 with duplex microstructure. Both materials exhibited rising R-curve behavior. The Si 3N 4-TiN composites, however, displayed better damage tolerance and higher resistance to crack growth. From TEM observation, it was inferred that this superior performance of Si 3N 4-TiN composites can be attributed mainly to stress-induced microcracking at heterophase (Si 3N 4/TiN) boundaries.
|Number of pages||4|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 1997 Oct 1|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry