Abstract
A mathematical model to predict the thermomechanical stresses was used to understand the expansion mismatch damage in castables, evaluated by hot elastic modulus measurements. The results indicated that via elastic modulus evaluation and the tensile stress calculation, the critical interactions among the particles leading to the formation of flaws were identified. To assure the materials' integrity, it is fundamental to keep a low Δα between the components and not only a low overall linear thermal expansion coefficient. For multicomponent compositions, a second‐phase raw material with different properties should be added as finer particles to minimize the thermomechanical stresses generated.
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