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Uniaxial viscosity of gadolinium-doped ceria determined by discontinuous sinter forging

Chang, Jaemyung and Guillon, Olivier and Rödel, Jürgen and Kang, Suk-Joong L. (2007):
Uniaxial viscosity of gadolinium-doped ceria determined by discontinuous sinter forging.
In: Journal of the European Ceramic Society, pp. 3127-3133, 27, (10), ISSN 09552219,
[Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2007.01.003],
[Article]

Abstract

The sintering behaviour of nanocrystalline gadolinium-doped ceria was investigated. The uniaxial viscosity determined from isothermal discontinuous sinter forging experiments. It increased dramatically during sintering from a few GPa·s at 85% to not, vert, similar120 GPa·s at 97% relative density. These values, however, are much lower than those measured for other oxide materials with submicron sizes because of much finer grain size. Since the experiments were done under isothermal conditions, it is possible to evaluate separately the effects of the relative density and the grain size. Due to grain coarsening, the effect of grain size becomes significant at high relative density, as some available models predict. It was found that Rahaman's model best fit the experimental data.

Item Type: Article
Erschienen: 2007
Creators: Chang, Jaemyung and Guillon, Olivier and Rödel, Jürgen and Kang, Suk-Joong L.
Title: Uniaxial viscosity of gadolinium-doped ceria determined by discontinuous sinter forging
Language: English
Abstract:

The sintering behaviour of nanocrystalline gadolinium-doped ceria was investigated. The uniaxial viscosity determined from isothermal discontinuous sinter forging experiments. It increased dramatically during sintering from a few GPa·s at 85% to not, vert, similar120 GPa·s at 97% relative density. These values, however, are much lower than those measured for other oxide materials with submicron sizes because of much finer grain size. Since the experiments were done under isothermal conditions, it is possible to evaluate separately the effects of the relative density and the grain size. Due to grain coarsening, the effect of grain size becomes significant at high relative density, as some available models predict. It was found that Rahaman's model best fit the experimental data.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 27
Number: 10
Uncontrolled Keywords: Sintering; Viscous behaviour; CeO2; Fuel cells
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:19
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2007.01.003
Identification Number: doi:10.1016/j.jeurceramsoc.2007.01.003
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