Abstract
The internal stresses in a disk-shaped ceramic composite sample consisting of five ZrB2 – 20% SiC layers with various additives of ZrO2 after cooling down from the sintering temperature are analyzed. The problem is solved numerically using the finite element method. Three versions of the simulation were performed. In the first two simulations, it was supposed that all the properties of the composite constituents are temperature independent and correspond to the temperature of sintering and room temperature, respectively. In the third simulation, we take into account the dependence of the physical and mechanical characteristics of the composite components on the temperature. Comparing the results reveals a profound effect of the temperature dependence of the properties. The residual thermal stresses determined on different sides of the layer interfaces vary in hundreds of MPa. The tensile residual thermal stress level is shown to be high enough for possible cracking of the ceramic layered composite after cooling.
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