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To increase the efficiency of aircraft gas turbine engines, it is necessary to increase the temperature of the gas before the turbine. However, metal alloys used in modern designs may not be used for this without a reduction in the durability of parts. One way to solve this problem is to develop turbine designs with ceramic elements. The issues of ensuring thermal resistance of the lock joints of turbine impellers with blades made of monolithic ceramic material are considered in this work. Models of mechanical and thermal contact of ceramic and metal parts are presented. The influence of the scale factor and stress concentration factor on the tensile strength of the ceramic parts is studied.

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The Determination of Rational Parameters of Lock Joints of Ceramic Blades with a Metal Disk in Advanced Aircraft Gas Turbine Engines. Part I. Models of Mechanical and Thermal Contact of Ceramic and Metal Parts of the Turbine Impeller