Superplastic Phenomenon in Sc2O3 Doped Zirconia Polycrystals to be Used for SOFC
The 4mol%Sc2O3 doped ZrO2 (4ScSZ) showed a superplastic-like large elongation in a range of strain-rate at 1773K. The large elongation was caused by both of high strain-rate sensitivity and high strain hardening during the deformation. Ion conductivity of the 4ScSZ, deformed superplastically at a relatively high strain-rate region, was higher than that of non-deformed one, suggesting that superplastic deformation can improve its conductivity. These results are discussed with probable microstructural evolution.
Y. Motohashi et al., "Superplastic Phenomenon in Sc2O3 Doped Zirconia Polycrystals to be Used for SOFC", Materials Science Forum, Vols. 551-552, pp. 481-486, 2007