Hardness indentations with a Vickers pyramid under a load as low as 0.1 N applied at room temperature induce amorphization in single-crystal mullite when applied to the (001) crystallographic face. Different zones of damage were identified via TEM. Directly under the indenter, in the region of high-compressive stress, mullite becomes amorphous. Further out toward the matrix material, there exists a region of high plastic deformation in the form of dislocation networks, radial micro-cracks, and bend contours. The Vickers-induced damage is comparable to that produced by dynamic shock or intense ball milling of mullite.
|Original language||English (US)|
|Number of pages||2|
|Journal||Journal of the American Ceramic Society|
|State||Published - Oct 2003|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry