Effect of molybdenum carbide intermediate layers on thermal properties of copper-diamond composites
Effect of molybdenum carbide intermediate layers on thermal properties of copper-diamond composites
复制标题
碳化钼中间层对铜金刚石复合材料热性能的影响
DOI：
10.1016/j.jallcom.2013.04.121
复制
发表时间：
2013-11-05
影响因子：
6.2
通讯作者：
Qu, Xuanhui
中科院分区：
文献类型：
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作者：
Kang, Qiping;He, Xinbo;Qu, Xuanhui
采用熔盐法制备了碳化钼(Mo2C)包覆金刚石颗粒，并用真空压力浸渍法制备了包覆Mo2C的金刚石颗粒/纯铜复合材料。研究了Mo2C层的形成机理，并对所得铜-金刚石复合材料的微观结构、热导率和热膨胀行为进行了研究。以MoO_3为反应介质，在混合熔盐中形成了包覆层，并对金刚石颗粒表面Mo2C包覆层的形成机理进行了探讨。结果表明，Mo2C层的形成分两步进行，即MoO_3还原为MoO_2和MoO_2还原为Mo2C。有效地改善了金刚石颗粒与铜之间的润湿性，铜-金刚石复合材料的相对密度达到99.5%。含60%Mo2C包覆金刚石的复合材料的热导率达到596Wm(-1)K-1，热膨胀系数为7.15×10-6 K-1。这种复合材料有望适用于电子封装应用。(C)Elsevier B.V.出版的2013年
Molybdenum carbide (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 formation mechanism of the Mo2C layers was investigated, and the microstructure, thermal conductivity and thermal expansion behavior of the obtained copper-diamond composites were studied. The coated layers were formed by using a reaction medium of MoO3 in mixed molten salts, and the formation mechanism of the Mo2C layers on diamond particles was investigated. The result indicates that the formation of Mo2C layers occurred in two steps, that is, the reduction of MoO3 to MoO2 and the reduction of MoO2 to Mo2C. The wettability between diamond particles and copper was effectively improved, and the relative density of the copper-diamond composites achieved 99.5%. The thermal conductivity reached 596 W m(-1) K-1, and the coefficient of thermal expansion was 7.15 x 10(-6) K-1 of the composites with 60 vol.% Mo2C-coated diamond. This composite is expected to be suitable for electronic packaging applications. (C) 2013 Published by Elsevier B.V.