Abstract
This paper describes the decomposition behavior of zirconium tungstate (ZrW2O8) materials above 1 050 K. The materials are synthesized according to a sol–gel‐route and a solid‐state route, and have been characterized with respect to their crystallographic properties. Apart from the initial phase and decomposition products ZrO2 and WO3, the additional phase γ‐ZrW2O8 is found, which results from a phase transition initiated by local pressures higher than 200 MPa. Residual stresses induced by the thermal mismatch between different phases within the composite material are found to be 1.15 GPa(ZrO2/ZrW2O8) and 1.26 GPa (WO3/ZrW2O8). Obtained stress values are high enough to induce this transition.
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