The analysis of a heat transfer mechanism in the bulk of carbon-carbon composite materials was performed. It was experimentally determined that a homogeneous thermal condition is established at a depth of up to twenty structural cells of the composite. A characteristic layered porosity structure of the material formed by crack-like pores was revealed, and the extent of reduction in thermal conductivity upon splitting the samples into parts was determined. It was found that the process of cooling of the hot reinforcement rod in the carbon substance of the composite is less dependent on the effective thermal conductivity in the direction transversal to a bundle of parallel fibers in a 1D-reinforcement rod, and more dependent on the contact thermal resistance along the boundaries of the crack-like pores filled with air having a thermal conductivity of about 0.3 W/(m·K).

中文翻译：

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碳复合材料热物理特性形成的实验与数值研究。第1部分。碳复合材料的热物理特性的形成

对大部分碳-碳复合材料中的传热机理进行了分析。通过实验确定，在复合材料的多达二十个结构单元的深度处建立了均匀的热条件。揭示了由裂纹状孔形成的材料的特征性层状孔隙结构，并确定了将样品分成几部分后导热系数降低的程度。发现在复合材料的碳素材料中冷却热增强棒的过程较少依赖于在与一维增强棒中的平行纤维束横向的方向上的有效导热率，