ABSTRACT Graphite flake/Al composites are promising thermal management materials due to their lightweight and excellent thermal properties. The interface structure is a key factor that impacts the thermophysical properties. In this work, a prediction model based on the Hatta-Taya model and an extended diffusion mismatch model was developed to evaluate the effect of the interface structure on the interfacial thermal conductance (ITC) and thermal conductivity (TC) of graphite flake/Al composites. Although the model only approximates the ITC rather than precisely calculates it, the model can effectively predict the TC. The theoretical ITC between graphite and various materials can reach 108 W/m2K. The TCs of graphite/Al composites with different interlayers decrease with increasing interlayer thickness but at different rates. Interface layers with high TCs, such as Cu, W, SiC, Si and WC, have good TC performance, regardless of their thickness. Among them, W layers are considered to be the most promising candidate to improve the TC of graphite/Al composites.

中文翻译：

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石墨片/铝复合材料界面热导率和热导率的理论和预测模型

摘要石墨片/铝复合材料由于其轻质和优异的热性能而成为很有前途的热管理材料。界面结构是影响热物理性能的关键因素。在这项工作中，开发了基于 Hatta-Taya 模型和扩展扩散失配模型的预测模型，以评估界面结构对石墨片/铝复合材料的界面热导 (ITC) 和热导 (TC) 的影响. 虽然该模型只是对 ITC 进行了近似而不是精确计算，但该模型可以有效地预测 TC。石墨与各种材料之间的理论ITC可达108 W/m2K。具有不同夹层的石墨/铝复合材料的 TC 随夹层厚度的增加而降低，但速率不同。具有高 TC 的界面层，如 Cu、W、SiC、Si 和 WC，无论其厚度如何，都具有良好的 TC 性能。其中，W层被认为是提高石墨/铝复合材料TC的最有希望的候选材料。