Thermal Physical Properties of Al-coated Diamond/Cu Composites
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第2期
论文作者：朱聪旭 ZHU Xuliang ZHAO Hongxiao FA Wenjun YANG Xiaogang 郑直
文章页码：315 - 319
摘 要：To acquire a well bonded interface between the copper and the diamond particles in diamondcopper matrix composites, an available process to apply a vapor deposited aluminum（Al） coating onto diamond particles was used to solve this interfacial problem. The diamond-copper matrix composites were prepared by spark plasma sintering（SPS） process and the effect of Al-coated diamond particles was demonstrated. The experimental results showed that the densification, interfacial bonding and thermal conductivity of Al-coated composites were evidently improved compared to those of the uncoated composites. A maximum thermal conductivity（TC） of 565 W/（m·K） was obtained in the coated composite containing 50vol% diamond particles sintered at 1163 K. Additionally, the experimental data of thermal conductivity and coefficient of thermal expansion（CTE） were compared with the predictions from several theoretical models.
朱聪旭1，ZHU Xuliang2，ZHAO Hongxiao1，FA Wenjun1，YANG Xiaogang1，郑直1
1. Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, Xuchang University2. State Grid Tianjin Electric Power Research Institute
摘 要：To acquire a well bonded interface between the copper and the diamond particles in diamondcopper matrix composites, an available process to apply a vapor deposited aluminum（Al） coating onto diamond particles was used to solve this interfacial problem. The diamond-copper matrix composites were prepared by spark plasma sintering（SPS） process and the effect of Al-coated diamond particles was demonstrated. The experimental results showed that the densification, interfacial bonding and thermal conductivity of Al-coated composites were evidently improved compared to those of the uncoated composites. A maximum thermal conductivity（TC） of 565 W/（m·K） was obtained in the coated composite containing 50vol% diamond particles sintered at 1163 K. Additionally, the experimental data of thermal conductivity and coefficient of thermal expansion（CTE） were compared with the predictions from several theoretical models.
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