Abstract
Improved elongations were obtained for samples prepared from a novel powder of 2.5 mol % yttria stabilized zirconia when compared to the commercial powders used up to date. The novel powder consists of mixing two phases, zirconia and 6 mol % yttria stabilized zirconia particles to give an average composition of 2.5 mol % yttria. The XRD spectra revealed that unlike the commercial 2.5 mol % YSZ, the sintered samples obtained from the new powder consisted of a broader range of tetragonal phases. This implies that a wider distribution of yttria composition was present in the microstructure. Grain growth data during deformation showed that grain growth is a lot slower in samples prepared from the new powder than the commercial powder. The sluggish grain growth is caused by a non equilibrium microstructurc and hence improved tensile elongations were obtained.
| Original language | English |
|---|---|
| Pages (from-to) | 531-536 |
| Number of pages | 6 |
| Journal | Materials Science Forum |
| Volume | 304-306 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |
Keywords
- Ceramics
- Non-equilibrium microstructure
- Superplasticity
- Zirconia
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering