In general, the thermal properties of the CFC include the specific heat capacity, thermal expansion properties, thermal conductivity, thermal diffusion properties, and thermal radiation properties.

The thermal expansion performance and thermal conductivity are not only the basic performance data to evaluate and measure the service situation of CFC in a high-temperature environment, but also an important means to study the microstructural changes such as the interfacial thermal stress, phase transition, microcracks and defects of CFC.

Therefore, the main factors affecting the thermal expansion performance and thermal conductivity of the CFC (fiber type, woven structure of the fibers, the type and microstructure of matrix carbon, and heat treatment temperature of the material, etc.) have been paid close attention by the researchers.

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