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Superplastic Phenomenon in Sc2O3 Doped Zirconia Polycrystals to be Used for SOFC

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Abstract:

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.

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Periodical:

Materials Science Forum (Volumes 551-552)

Pages:

481-486

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.481

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Online since:

July 2007

Authors:

Yoshinobu Motohashi, H. Ishimura, Y. Kobayashi, Takaaki Sakuma

Keywords:

Sc2O3 Doped Stabilized Zirconia, Solid Oxide Fuel Cell (SOFC), Strain Hardening Coefficient, Strain Rate Sensitivity (SRS), Superplasticity, TZP

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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