Thermophysical Properties of Ceramic Materials of Molds and Cores for Casting the Heat-Resistant Alloy-Based Blades of Gas-Turbine Engines

摘要

The thermal diffusivity, thermal conductivity, temperature coefficient of linear expansion (TCLE), and specific heat capacity of ceramic materials of shell molds and cores for casting parts of heat-resistant nickel-based alloys for gas-turbine engines (GTEs) are measured in a temperature range from 20 to 1500℃ by the use of methods of laser flash, relative dilatometer with a pusher, and differential scanning calorimetry (DSC). The effect of the sample thickness, various process coatings, and environment is investigated. The composition and temperature dependences of thermal diffusivity and heat expansion are considered.