OXIDE-OXIDE COMPOSITES FOR GAS-TURBINE ENGINES
Ceramic composite oxide-based materials attract the attention of the developers for use in environments where metal materials exhibit a tendency to creep and oxidation. High-temperature ceramic composites, methods of obtaining and properties of the resulting materials are the object of special attention at international conferences and congresses on ceramics in the last fifteen years. Aluminum oxide is one of the most promising ceramic materials for a wide range of applications in extreme conditions thanks to its combination of high hardness, heat resistance, chemical inertness, with its accessibility and efficiency. However, the use of alumina-based materials in loaded conditions is limited for the low impact resistance, typical for ceramics. Rapid crack propagation under shock loads reduces the reliability of the materials, so the material engineers, conduct research mechanisms of crack propagation, offer many different additives for oxide matrices and processing methods, contributing to the strength increase at a bend and impact strength materials. The paper contains a review of high-temperature structural composite materials with oxide matrices for combustion chambers of gas-turbine engines.