Preparation of high thermal conductivity copper-diamond composites using molybdenum carbide-coated diamond particles
Preparation of high thermal conductivity copper-diamond composites using molybdenum carbide-coated diamond particles
复制标题
碳化钼包覆金刚石颗粒制备高导热铜金刚石复合材料
DOI：
10.1007/s10853-013-7409-3
复制
发表时间：
2013-09-01
影响因子：
4.5
通讯作者：
Qu, Xuanhui
中科院分区：
文献类型：
--
作者：
Kang, Qiping;He, Xinbo;Qu, Xuanhui
为了改善金刚石颗粒与铜的界面结合，提出在金刚石颗粒表面涂覆碳化钼（Mo 2C）涂层。采用熔盐法制备了Mo 2C包覆金刚石颗粒，并将其与纯铜进行真空压力浸渗制备了铜-金刚石复合材料。涂层和复合材料的结构进行了研究，使用X射线衍射，扫描电子显微镜，和能量色散X射线光谱。结果表明，Mo 2C涂层有效地改善了金刚石颗粒与铜基体之间的润湿性，Mo 2C中间层降低了复合材料的界面热阻。复合材料的热导率达到608 Wm（-1）K-1，其中65 vol. % Mo_2C涂层金刚石比未涂层金刚石的抗氧化能力强得多。大大增强的热导率归因于1 μ m厚的Mo 2C涂层。在金刚石颗粒表面包覆Mo 2C是提高铜-金刚石复合材料热导率的有效途径。
Molybdenum carbide (Mo2C) coatings on diamond particles were proposed to improve the interfacial bonding between diamond particles and copper. The Mo2C-coated diamond particles were prepared by molten salts method and the copper-diamond composites were obtained by vacuum pressure infiltration of Mo2C-coated diamond particles with pure copper. The structures of the coatings and composites were investigated using X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The results indicated that the Mo2C coatings effectively improved the wettability between diamond particles and copper matrix, and Mo2C intermediate layers were proved to decrease the interfacial thermal resistance of composites. The thermal conductivity of the composite reached 608 Wm(-1) K-1 with 65 vol.% Mo2C-coated diamond, which was much higher than that with uncoated diamond. The greatly enhanced thermal conductivity is ascribed to the 1-mu m-thick Mo2C coatings. Mo2C coatings on diamond particles are proved to be an effective way to enhance the thermal conductivities of copper-diamond composites.