Diamond particles coated with a 45 nm-thick W layer were used to produce diamond particles reinforced Al matrix composites (Al/diamond(W)) by a gas pressure infiltration method. The results show that W atoms have diffused into Al matrix and replaced Al atoms during infiltration. As a result, a uniform 0.5 nm-thick Al₅W interfacial layer is formed in the composite produced with 20 min infiltration time. The generation of the Al₅W layer strengthens not only the interfacial bonding but also impedes the formation of hydrolysable Al₄C₃ phase. With increasing infiltration time from 10 to 60 min, the thermal conductivity increases from 520 to 620 W/m K, which manifests the influence of interfacial layer thickness on thermal properties of the Al/diamond(W) composite. The study provides a new strategy to modifying the interfacial structure of Al/diamond composites on the aspects of both enhancing the thermal conductivity and preventing the formation of hydrolysable Al₄C₃ phase.

通过气压渗透法，将涂覆有45 nm厚W层的金刚石颗粒用于生产金刚石颗粒增强的Al基复合材料（Al / diamond（W））。结果表明，W原子已经扩散到Al基体中，并在渗透过程中取代了Al原子。结果，在以20分钟的渗透时间生产的复合物中形成了均匀的0.5nm厚的Al ₅ W界面层。Al ₅ W层的产生不仅增强了界面结合，而且阻碍了可水解Al ₄ C ₃的形成。阶段。随着渗透时间从10分钟增加到60分钟，导热系数从520 W / m K增加到620 W / m K，这表明界面层厚度对Al / Diamond（W）复合材料的热性能产生了影响。该研究为改善铝/金刚石复合材料的界面结构提供了新的策略，既可以提高导热系数，又可以防止可水解的Al ₄ C ₃相的形成。