【作者】 祝平； 夏一骁； 张强； 芶华松； 武高辉；

【Author】 Zhu Ping;Xia Yixiao;Zhang Qiang;Gou Huasong;Wu Gaohui;School of Materials Science and Engineering,Harbin Institute of Technology;Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology,School of Material Science and Engineering,Harbin Institute of Technology;

【机构】 哈尔滨工业大学材料科学与工程学院； 哈尔滨工业大学先进结构功能一体化材料与绿色制造技术工信部重点实验室；

【摘要】 采用900℃真空高温处理90min的方式将金刚石颗粒表面的W镀层原位转变为WC镀层。利用气压浸渗法制备了无镀层及WC镀层金刚石/铝复合材料,引入WC镀层后,由于高温处理对金刚石颗粒的损伤及金属间化合物的生成,复合材料的界面结合较差,热导率低于无镀层金刚石/铝复合材料。然而WC镀层的引入有效抑制了界面产物Al₄C₃的生成,湿热处理30天后,WC镀层金刚石/铝复合材料热导率几乎没有变化,而无镀层金刚石/铝复合材料热导率下降了8%。WC镀层的引入提高了金刚石/铝复合材料湿热环境下的性能可靠性。更多还原

【Abstract】 The W coating on the surface of diamond particles was completely in-situ transformed into WC coating by vacuum high-temperature treatment at 900℃ for 90 min. Uncoated and WC coated diamond/aluminum composites were prepared by gas pressure infiltration method. After introducing WC coating,the interface bonding of the composite was poor due to the damage of diamond particles and the generation of intermetallic compounds caused by high-temperature treatment,and the thermal conductivity was lower than that of the uncoated diamond/aluminum composite material. However,the introduction of WC coating effectively suppressed the formation of interface product Al₄C₃. After 30 days of heat-moisture treatment,the thermal conductivity of WC-coated diamond/aluminum composite material remained almost unchanged,while the thermal conductivity of uncoated diamond/aluminum composite material decreased by 8%. The introduction of WC coating has improved the performance reliability of diamond/aluminum composite materials in heat-moisture environments.更多还原