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中文摘要：
利用稳态量热计法和傅里叶红外光谱仪分别测定了3D C／SiC复合材料在90℃时的半球向总发射率和室温法向光谱反射率，研究了表面形貌、涂层厚度及高温氧化对3D C／SiC热辐射性能的影响。结果表明：3D C／SiC具有优异的热辐射性能．其总发射率可达0．83；随着SiC涂层厚度的增加，3D C／SiC总发射率先降低后上升；高温氧化后．3D C／SiC的热辐射性能有所提高。
英文摘要：
The total hemisphere emissivity （εH） at 90℃ and the normal spectral reflectance at room temperature of 3D C/SiC composites were measured with the steady state calorimeter method and FTIR, respectively. The effects of the surface morphology, thickness of SiC coating and high temperature oxidation on the thermal radiation properties of 3D C/SiC were investigated. The results show that 3D C/SiC composites have excellent thermal radiation properties and the total hemisphere emissivity attains 0.83. With increasing the SiC coating thickness, the total hemisphere emissivity of 3D C/SiC composites decreases first and increases then. After oxidation, the thermal radiation properlies of 3D C/SiC with three character surface remarkably increase.
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