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Materials & Design
Year: 2009  |  Volume: 30  |  Issue: 5  |  Page No.: 1667 - 1673

Modeling of the effective elastic and thermal properties of glass-ceramic solid oxide fuel cell seal materials

J. Milhans, S. Ahzi, H. Garmestani, M.A. Khaleel, X. Sun and B.J. Koeppel    

Abstract: In this study, the effective elastic properties and coefficients of thermal expansion (CTE) of a glass-ceramic were predicted using homogenization techniques. Using G18, a glass-ceramic solid oxide fuel cell (SOFC) sealant as an initial reference material, the effectiveness of different homogenization models was investigated for a two-phase glass-ceramic. The elastic properties and CTEs of the G18 amorphous phase are currently unknown. Thus, estimated values were used as an input to the models. The predictive model offers accurate macroscopic values on both the elastic modulus and the CTE of glass-ceramic materials, providing the estimated amorphous values are reasonable. This model can be used in designing glass-ceramic SOFC seal materials for its specific operation conditions.

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