The mechanical properties of Si3N4 materials depend mainly on the microstructure, which originates during the densification process. The microscopic evidence indicates that β-Si3N4 seeds incorporated in the starting powders play an important role in microstructural development, especially in the heterogeneous grain growth of β-Si3N4 grains during sintering. The growth of β-grains is initiated from the β-seeds, resulting in a core/shell microstructure. The presence of Moiré fringes and dislocations is attributed to misfit strain and compositional differences between the core and the shell. Coalescence can occur at the final stage of sintering.
|Number of pages||5|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 2001 Feb 6|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry