Abstract
The sintering, mechanical, and thermophysical characteristics of composites of Al2O3 and Al2TiO5 and the connection between these parameters and the microstructure and thermal-shock resistance have been studied. Extremal properties have been found in the compositions containing 30–50% of Al2TiO5. The excellent thermal-shock resistance of the composites is the result of the fragmentary structure which increases the destructive energy of the specimen under thermal-shock. The anomalous increase in the high-temperature ultimate strength of the composites containing 30–50% of Al2TiO5 in the 20–1200°C is demonstrated; this is the result of the separation of the decomposition products of Al2TiO5 along the crystal boundaries of the refractory base and of the elastic-stressed state which arises.
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