Premium
Finite Element Modeling of Camber Evolution During Sintering of Bilayer Structures
Author(s) -
Molla Tesfaye Tadesse,
Ni De Wei,
Bulatova Regina,
Bjørk Rasmus,
Bahl Christian,
Pryds Nini,
Frandsen Henrik Lund
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13025
Subject(s) - sintering , finite element method , materials science , bilayer , shrinkage , camber (aerodynamics) , kinetics , composite material , mechanics , membrane , thermodynamics , classical mechanics , physics , chemistry , biochemistry
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 0.85 Sr 0.15 MnO 3 and Ce 0.9 Gd 0.1 O 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.