PNNL

Abstract

Statistical continuum mechanics is used to predict the coefficient of thermal expansion (CTE) for solid oxide fuel cell glass-ceramic seal materials with different morphology and crystallinity. Two-point correlation functions are utilized to represent the microstructure morphology and phase distribution. The model uses two-point correlation function representing microstructure, along with local properties, to predict the effective CTE. Prediction results agree well with experimental results. The advantage of the statistical continuum mechanics model in predicting the effective properties of anisotropic media is to take into consideration of microstructure.