The domain structures in tetragonal zirconia (t-ZrO2formed by the diffusionless cubic-to-tetragonal transformation have been examined in ZrO23mol%Y2O3-12mol%TiO2which has a wide single t-ZrO2field. During annealing in the single-phase field, the domain boundaries with antiphaseboundary-like contrast tend to be facetted with a habit plane close to one of the (111) planes. Transmission electron microscopy-energy-dispersive spectroscopy analysis shows that yttrium ions segregate to the domain boundaries. Since the domain boundaries have a cubic structure, they must be stabilized by the segregation of yttrium ions, which are known to stabilize cubic zirconia.
ASJC Scopus subject areas
- Condensed Matter Physics