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


Article Preview

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.



Materials Science Forum (Volumes 551-552)

Edited by:

K.F. Zhang




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

Online since:

July 2007




[1] Y. Motohashi, S. Akatsu, S. Kakita and Y. Maruyama: Material Science Forum, Vol. 447-448 (2004), pp.305-310.

[2] S. Harjo, J. Saroun, Y. Motohashi, N. Kojima, V. Ryukhtin, P. Strunz, M. Baron and R. Loidl: Mater. Trans. Vol. 45 (2004), pp.824-832.

[3] Y. Motohashi, M. Kikuchi, T. Ito, T. Shibata, M. Ishida and K. Sawa: Proc. 2 nd JSME/ASME Int. Conf. Mater. Processing (M&P 2005) (2005), (SUP-05)1-5.

[4] S.P.S. Badwal and J. Drennan: Materials Forum, Vol. 16 (1992), pp.237-244.

[5] J.E. Bauerle and J. Hrizo: J. Phys. Chem. Solids, Vol. 30 (1969), pp.565-570.

[6] T. Ishii: Solid State Ionics, Vol. 78 (1995), pp.333-338.

[7] S.P.S. Badwal, F.T. Ciacchi, S. Rajendran and J. Drennan: Solid State Ionics, Vol. 109 (1998), pp.167-186.

[8] A. Lakki, R. Herzog, M. Weller, H. Schubert, C. Reetz, O. Görke, M. Kilo and G. Borchardt, J. Europ: Ceram. Soc., Vol. 20 (2000), pp.285-296.

[9] R. Chiba, T. Ishii and F. Yoshimura: Solid State Ionics, Vol. 91 (1996), pp.249-256.

[10] S.P.S. Badwal: J. Mater. Sci., Vol. 22 (1987), pp.4125-4132.