Chang, Jaemyung ; Guillon, Olivier ; Rödel, Jürgen ; Kang, Suk-Joong L. (2007)
Uniaxial viscosity of gadolinium-doped ceria determined by discontinuous sinter forging.
In: Journal of the European Ceramic Society, 27 (10)
doi: 10.1016/j.jeurceramsoc.2007.01.003
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Chang, Jaemyung ; Guillon, Olivier ; Rödel, Jürgen ; Kang, Suk-Joong L. |
| Art des Eintrags: | Bibliographie |
| Titel: | Uniaxial viscosity of gadolinium-doped ceria determined by discontinuous sinter forging |
| Sprache: | Englisch |
| Publikationsjahr: | September 2007 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 27 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1016/j.jeurceramsoc.2007.01.003 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | Sintering; Viscous behaviour; CeO2; Fuel cells |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 18 Mai 2011 15:19 |
| Letzte Änderung: | 05 Mär 2013 09:47 |
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