Key Laboratory of Advanced Functional Composite Materials, Aerospace Research Institute of
Materials and Processing Technology；North China Electric Power University, Beijing
Because of its excellent properties, such as lightweight, high thermal conductivity, high specific modulus, low heat expansibility and all excellent properties of traditional C/C composites, the high thermal conductivity C/C composites (HTC-C/Cs) have become research focus in recent years and have broad application prospect in the fields of aerospace, electronics, nuclear industry and so on. In present study, effects of key structural parameters on the thermal conductivity of C/C composite were quantitatively analyzed based on the analytical model of thermal conductivity, which was defined as a function of the microscopic structure parameters of C/C composite with typical architectural feature. Based on the analysis results, HTC-C/Cs with different textures and dimensions were designed, prepared and characterized. As a result, the thermal conductivities of prepared unidirectional, 2D and 3D HTC-C/Cs were more than 700, 400 and 350 W/ m·K at room temperature, respectively.