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Constrained sintering kinetics of 3YSZ films

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journal contribution
posted on 13.12.2012, 10:24 authored by Jung-Sik Kim, Robert A. Rudkin, Xin Wang, Alan Atkinson
3YSZ green layers approximately 10 μm thick were screen-printed onto 3YSZ substrates and their constrained sintering kinetics were measured at 1100–1350 °C using an optical dilatometer. The densification rates of the same powder in the form of pellets and free-standing films were also measured. The constrained densification rate was greatly retarded compared with the free densification rate at a given temperature and density. The retardation increased with increasing density and temperature and could not be properly accounted for by existing theories of constrained sintering. As a result the apparent activation energy is much lower for constrained sintering (135 ± 20 kJ mol−1) than for free sintering (660 ± 30 kJ mol−1). It is proposed that this is because the constrained microstructure exhibits larger and more widely separated pores at the higher temperatures.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

KIM, J-S. ... et al., 2011. Constrained sintering kinetics of 3YSZ films. Journal of the European Ceramic Society, 31 (13), pp. 2231 - 2239.

Publisher

© Elsevier Ltd.

Version

AM (Accepted Manuscript)

Publication date

2011

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.2011.05.044

ISSN

0955-2219

Language

en

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