A sintering model describing the stress evolution in a sintering film on a pre-sintered thick ceramic substrate is developed. The model is bench-marked by measuring the development of curvature during sintering of multiple thin films on a thin pre-sintered ceramic strip for three different constant heating rates l°C/min, 3°C/min and 5°C/min. A theoretical analysis was conducted assuming that the strip deforms under plane strain conditions. The predicted curvature results are compared with the experimental results. It was found that the viscosity of the substrate has a large effect on the curvature. The curvature increases with decreasing viscosity of the substrate. Since the substrate viscosity was not measured it was assumed such that the model prediction is forced to agree well with the experimental results for the specific heating rate of 3°C/min. When the same expression was used for the other two heating rates, the model prediction agreed fairly well with the measurement.
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