Modeling Kinetics of Distortion in Porous Bi-layered Structures

Tesfaye Tadesse Molla, Henrik Lund Frandsen, Rasmus Bjørk, De Wei Ni, Eugene Olevsky, Nini Pryds

Research output: Contribution to journalJournal articleResearchpeer-review

421 Downloads (Pure)

Abstract

Shape distortions during constrained sintering experiment of bi-layer porous and dense cerium gadolinium oxide (CGO) structures have been modeled. Technologies like solid oxide fuel cells require co-firing thin layers with different green densities, which often exhibit differential shrinkage because of different sintering rates of the materials resulting in undesired distortions of the component. An analytical model based on the continuum theory of sintering has been developed to describe the kinetics of densification and distortion in the sintering processes. A new approach is used to extract the material parameters controlling shape distortion through optimizing the model to experimental data of free shrinkage strains. The significant influence of weight of the sample (gravity) on the kinetics of distortion is taken in to consideration. The modeling predictions indicate good agreement with the results of sintering of a bi-layered CGO system in terms of evolutions of bow, porosities and also layer thickness.
Original languageEnglish
JournalJournal of the European Ceramic Society
Volume33
Issue number7
Pages (from-to)1297–1305
ISSN0955-2219
DOIs
Publication statusPublished - 2013

Keywords

  • Modeling
  • Sintering
  • Bi-layer
  • Distortion

Fingerprint Dive into the research topics of 'Modeling Kinetics of Distortion in Porous Bi-layered Structures'. Together they form a unique fingerprint.

Cite this