Abstract
In order to determine the influence of alumina on the superplasticity of yttria stabilized zirconia (YSZ) in the solubility limit of zirconia, 0.4 mol% alumina was doped to 3 mol% yttria stabilized zirconia powders. Improvements for both superplastic flow and elongation to failure were obtained when compared to the undoped samples. TEM analysis, using HREM combined with EDS were carried out on the grain boundary, where no secondary phases were observed at grain boundary triple junctions and on the grain boundary. However both aluminium and yttrium ions were detected at the grain boundary, indicating the segregation of the solute ions over a width of about 6 nm. Aluminium ions were found to segregate to a certain extent to the grain boundary with the rest dissociating in the zirconia matrix.
| Original language | English |
|---|---|
| Pages (from-to) | 377-382 |
| Number of pages | 6 |
| Journal | Key Engineering Materials |
| Volume | 171-174 |
| Publication status | Published - 2000 Jan 1 |
| Externally published | Yes |
| Event | Proceedings of the 1999 8th International Conference on Creep and Fracture of Engineering Materials and Structures - Tsukuba, Japan Duration: 1999 Nov 1 → 1999 Nov 5 |
Keywords
- Grain Boundary
- Segregation
- Superplasticity
- Zirconia
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering