Finite Element Modeling of Camber Evolution During Sintering of Bilayer Structures. Issue 9 (11th June 2014)

• Record Type: Journal Article
• Authors: Molla, Tesfaye Tadesse; Ni, De Wei; Bulatova, Regina; Bjørk, Rasmus; Bahl, Christian; Pryds, Nini; Frandsen, Henrik Lund; Green, D. J.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 9(2014)
• Page Start: 2965
• Page End: 2972
• Publication Date: 2014-06-11
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13025
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13025-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The need for understanding the mechanisms and optimization of shape distortions during sintering of bilayers is necessary while producing structures with functionally graded architectures. A finite element model based on the continuum theory of sintering was developed to understand the camber developments during sintering of bilayers composed of La_0.85Sr_0.15MnO₃ and Ce_0.9Gd_0.1O_1.95 tapes. Free shrinkage kinetics of both tapes were used to estimate the parameters necessary for the finite element models. Systematic investigations of the factors affecting the kinetics of distortions such as gravity and friction as well as the initial geometric parameters of the bilayers were made using optical dilatometry experiments and the model. The developed models were able to capture the observed behaviors of the bilayers' distortions during sintering. Finally, we present the importance of understanding and hence making use of the effect of gravity and friction to minimize the shape distortions during sintering of bilayers.</p> </abstract>