Journal article
Modeling constrained sintering of bi-layered tubular structures
Department of Energy Conversion and Storage, Technical University of Denmark1
Mixed Conductors, Department of Energy Conversion and Storage, Technical University of Denmark2
Ceramic Engineering & Science, Department of Energy Conversion and Storage, Technical University of Denmark3
San Diego State University4
Electrofunctional materials, Department of Energy Conversion and Storage, Technical University of Denmark5
Constrained sintering of tubular bi-layered structures is being used in the development of various technologies. Densification mismatch between the layers making the tubular bi-layer can generate stresses, which may create processing defects. An analytical model is presented to describe the densification and stress developments during sintering of tubular bi-layered samples.
The correspondence between linear elastic and linear viscous theories is used as a basis for derivation of the model. The developed model is first verified by finite element simulation for sintering of tubular bi-layer system. Furthermore, the model is validated using densification results from sintering of bi-layered tubular ceramic oxygen membrane based on porous MgO and Ce0.9Gd0.1O1.95-d layers.
Model input parameters, such as the shrinkage kinetics and viscous parameters are obtained experimentally using optical dilatometry and thermo-mechanical analysis. Results from the analytical model are found to agree well with finite element simulations as well as measurements from sintering experiment.
Language: | English |
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Year: | 2015 |
Pages: | 941-950 |
ISSN: | 1873619x and 09552219 |
Types: | Journal article |
DOI: | 10.1016/j.jeurceramsoc.2014.10.010 |
ORCIDs: | Esposito, Vincenzo , Teocoli, Francesca , Bjørk, Rasmus , Pryds, Nini , Kaiser, Andreas and Frandsen, Henrik Lund |