D. Clarke—contributing editor
Electric Field-Assisted Sintering in Comparison with the Hot Pressing of Yttria-Stabilized Zirconia
Article first published online: 1 SEP 2010
© 2010 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 1, pages 24–31, January 2011
How to Cite
Langer, J., Hoffmann, M. J. and Guillon, O. (2011), Electric Field-Assisted Sintering in Comparison with the Hot Pressing of Yttria-Stabilized Zirconia. Journal of the American Ceramic Society, 94: 24–31. doi: 10.1111/j.1551-2916.2010.04016.x
This work was financially supported by the Deutsche Forschungsgemeinschaft (Emmy Noether Program GU993-1/1).
- Issue published online: 5 JAN 2011
- Article first published online: 1 SEP 2010
- Manuscript No. 27330. Received January 5, 2010; approved June 30, 2010.
This study aims at comparing hot pressing (HP) and the electric field-assisted sintering technique (FAST) of 8 mol% yttria-stabilized zirconia (8YSZ). Three different ionic conductive nano- and submicron powders were investigated, with a median particle size of 20–30, 51–65, and 150 nm, respectively. Processing parameters were kept identical for both sintering methods: sample geometry, heating schedule, applied pressure, and atmosphere. Investigations of densification and microstructural characterization reveal that under the same conditions FAST and HP sintered samples behave similarly. The analysis of the sintering curves shows that the densification mechanism is the same for both sintering methods (grain-boundary diffusion). An increase of the heating rate up to 150 K/min does not modify the densification mechanism. The sintering trajectory reveals that grain size depends only on density and not on the sintering method and grains have no preferential orientation. Secondary ion mass spectroscopy shows that both types of specimens are contaminated with carbon only superficially. Measurements of the electrical conductivity at high temperature show no significant difference between HP and FAST samples.