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Title: Constrained sintering kinetics of 3YSZ films
Authors: Kim, Jung-Sik
Rudkin, Robert A.
Wang, Xin
Atkinson, Alan
Keywords: Sintering
Fuel cells
Issue Date: 2011
Publisher: © Elsevier Ltd.
Citation: KIM, J-S. ... et al., 2011. Constrained sintering kinetics of 3YSZ films. Journal of the European Ceramic Society, 31 (13), pp. 2231 - 2239.
Abstract: 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.
Description: 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
Version: Accepted for publication
DOI: 10.1016/j.jeurceramsoc.2011.05.044
URI: https://dspace.lboro.ac.uk/2134/11176
Publisher Link: http://dx.doi.org/10.1016/j.jeurceramsoc.2011.05.044
ISSN: 0955-2219
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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