Si-Coated Diamond Particles Reinforced Copper Composites Fabricated by Spark Plasma Sintering Process

This article introduced a unique production process of diamond/Cu composite materials via spark plasma sintering. Moreover, effects of Si-coated diamond particles and diamond volume fraction on heat conduction of diamond/Cu composite materials were examined. This research presented Si-coated diamond/Cu composite materials yielded higher heat conduction than that of the samples with uncoated diamond particles. It was found that Si-coated composite materials, including a volume fraction of 50% Si-coated diamond particles, yielded a relatively higher heat conduction of 535 W/mK along with the relative density of 96.3%. The phases present were identified by X-ray diffraction and microstructures were studied by scanning electron microscopy. Additionally, the influence of interface on heat conduction of diamond/Cu composites was specifically discussed.