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Constrained sintering of 8mol% Y 2O 3 stabilised zirconia films

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journal contribution
posted on 13.12.2012 by Xin Wang, Jung-Sik Kim, Alan Atkinson
Constrained sintering kinetics of 8 mol% Y2O3/92 mol% ZrO2 (8YSZ) films approximately 10–15 m thick screen-printed on dense YSZ substrates, and the resulting stress induced in the films, were measured in the temperature range 1100–1350 ◦C. The results are compared with those reported earlier for 3YSZ films. Both materials behave similarly, although there are differences in detail. The constrained densification rate was greatly retarded compared with the unconstrained densification rate due to the effect of the constraint on the developing anisotropic microstructure (3YSZ) and, in the case of 8YSZ, considerable grain growth. The stress generated during constrained sintering was typically a few MPa. The apparent activation energies for free sintering, constrained sintering, creep and grain growth are found to cover a wide range (135–670 kJ mol−1) despite all probably being mainly controlled by grain boundary cation diffusion.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

WANG, X., KIM, J-S., and ATKINSON, A., 2012. Constrained sintering of 8mol% Y 2O 3 stabilised zirconia films. Journal of the European Ceramic Society, 32 (16), pp. 4121 - 4128.

Publisher

© Elsevier Ltd.

Version

AM (Accepted Manuscript)

Publication date

2012

Notes

This article was published in the Journal of the European Ceramic Society [© Elseview Ltd.] and the definitive version is available at: http://dx.doi.org/10.1016/j.jeurceramsoc.2012.05.036

ISSN

0955-2219

Language

en

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