Abstract Uniform Ag and Si layers were successfully prepared on the surface of graphite films (GF) to improve thermal conductivity (TC) by physical vapor deposition method (PVD). The results demonstrate that the unique cubic crystal structure of Ag layer with different deposition time show good interface bonding and no carbide product of Ag/GF composites. Meanwhile, the dense Si coating contribute to the enhancement of the thermal diffusion ability. The Ag/GF composites with the deposition time of 2 h possess the best comprehensive property with the TC of 9.93 (W/m·K), which is approximately 73.30% higher than untreated GF. The TC of Si/GF composites reach the maximum TC of 11.12 W/(m·K) and increase about 101.81% due to the nano-Si layer comparing with untreated GF. Those composites with high performance make them promising thermal management laminated materials.

中文翻译：

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PVD 合成的高导热纳米复合材料用于热管理应用

摘要 采用物理气相沉积法（PVD）在石墨薄膜（GF）表面成功制备均匀的Ag和Si层以提高热导率（TC）。结果表明，不同沉积时间的Ag层独特的立方晶体结构显示出良好的界面结合，并且没有Ag/GF复合材料的碳化物产物。同时，致密的Si涂层有助于增强热扩散能力。沉积时间为2 h的Ag/GF复合材料综合性能最好，TC为9.93（W/m·K），比未处理的GF高约73.30%。Si/GF复合材料的TC达到11.12 W/(m·K)的最大TC，与未处理的GF相比，由于纳米Si层增加了约101.81%。