Abstract Graphite/Al composites are promising thermal management materials due to their excellent thermal properties. However, the poor wettability between graphite and Al leads to easy formation of interfacial defects and pores, which impede the improvement of thermal properties. Cu coating was uniformly coated on the graphite films by a physical vapor deposition process to promote interfacial wetting. A novel Graphite film/Cu/Al composite material with good interfacial bonding was fabricated by an optimized vacuum hot pressing process. The results show that Cu coating is effective to improve the interfacial thermal conductance, in-plane and out-of-plane thermal conductivity of 17.4–53.2 vol% graphite film reinforced Al composites by more than 20 times, 3–4.5% and 14–25%, respectively. Graphite film/Cu/Al composites with graphite volume fraction of 17.4–53.2% have excellent in-plane thermal conductivities of 397–805 W/mK, which approach the theoretical values calculated by the thermal conductivity model of laminate composites and make them promising thermal management materials.

中文翻译：

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用于有效热管理的镀铜石墨膜/铝复合材料的制造和导热性

摘要 石墨/铝复合材料由于其优异的热性能而成为很有前途的热管理材料。然而，石墨与铝之间的润湿性差，容易形成界面缺陷和气孔，阻碍了热性能的提高。Cu涂层通过物理气相沉积工艺均匀地涂覆在石墨膜上以促进界面润湿。采用优化的真空热压工艺制备了一种界面结合良好的新型石墨膜/铜/铝复合材料。结果表明，Cu涂层可有效提高17.4-53.2 vol%石墨膜增强Al复合材料的界面热导率、面内和面外热导率20倍以上、3-4.5%和14-分别为 25%。