Graphite/copper composites had attracted significant recent attention for thermal management applications due to their superior thermal properties, low cost and ease of machining. However, achieving the enhancement of mechanical properties of composites with high thermal conductivity remained challenging. In this study, graphite/copper composites had been produced by vacuum hot pressing process, in which the boron carbide-boron coating was synthesized on graphite to improve the mechanical properties of copper matrix composites with high volume fraction of graphite. The resulting composites had superior thermal conductivity (676 W/mK, 180% of copper) and apposite coefficient of thermal expansion (7.1 ppm/K), which was attributed to the homogeneous dispersion and well-controlled alignment of graphite in the composite. And the results showed that the coating on graphite slightly decreased the thermal conductivity and coefficient of thermal expansion of the composites, but evidently improved the bending strength. The flexural strength raised to 74 MPa, 42% increased with that of uncoated composite.

石墨/铜复合材料因其优异的热性能，低成本和易于加工而在热管理应用领域引起了广泛的关注。然而，实现具有高导热率的复合材料的机械性能的增强仍然具有挑战性。本研究通过真空热压工艺制备了石墨/铜复合材料，其中在石墨上合成了碳化硼-硼涂层，以改善具有高体积分数的铜基复合材料的机械性能。所得复合材料具有优异的导热率（676 W / mK，180％的铜）和合适的热膨胀系数（7.1 ppm / K），这归因于复合物中石墨的均匀分散和良好的取向控制。结果表明，石墨涂层使复合材料的导热系数和热膨胀系数略有降低，但弯曲强度明显提高。抗弯强度提高到74 MPa，与未涂覆的复合材料相比提高了42％。