镀铬金刚石粒度、品级和膜厚对金刚石/铜复合材料热物性能的影响  

Effect of particle size,grade and coating thickness of diamond coated with chromium film on thermal properties of diamond/Cu composite

作　　者：黄霞[1,2] 徐燕军[1,2] 尹翔[1,2] 刘一波[1,2] 郑勇翔[1,2] 葛科 HUANG Xia;XU Yan-jun;YIN Xiang;LIU Yi-bo;ZHENG Yong-xiang;GE Ke(Advanced Technology ＆ Materials Co., Ltd., Beijing 100081, China;Beijing Gang Yan Diamond Product Company, Beijing 102200, China)

机构地区：[1]安泰科技股份有限公司,北京100081 [2]北京安泰钢研超硬材料制品有限责任公司,北京102200

出　　处：《粉末冶金工业》2018年第3期53-56,共4页Powder Metallurgy Industry

摘　　要：对不同品级和粒度的金刚石进行表面镀膜改性,用熔渗法制备了金刚石/铜复合材料。研究了金刚石品级、粒度与膜厚对复合材料热导率以及热膨胀特性的影响。结果表明：金刚石/铜复合材料的热导率随金刚石粒度增大和品级提高而增大;在其他条件相同的情况下,金刚石表面铬膜厚度为210 nm时复合材料的热导率为787 W/（m·K）,当铬膜厚度为150 nm时复合材料的热导率为633 W/（m·K）,表明镀铬膜太薄会降低复合材料的热导性能;在30-200℃范围内,金刚石/铜复合材料的热膨胀系数在（3.00-8.00）×10-（-6）K-（-1）之间,且随温度升高而升高。Diamond/Cu composites were prepared via infiltration method using diamonds with surface modification as raw materials. The effect of particle size,diamond grade and coating thickness on the composites＇ thermal conductivity（TC）and thermal expansion characteristics were studied. The results show that the TC of diamond/Cu composites increases with diamond particle size and diamond grade. The TC is 787 W/（m·K）when the thickness of chromium coating on diamond is 210 nm,and 633 W/（m·K）when the thickness is 150 nm,which indicates that too thin chromium coating on diamond leads to the decrease of composite thermal conductivity. The coefficient of thermal expansion（CTE）of diamond/Cu composites is among（3.00-8.00）×10-（-6） K-（-1） at temperature between 30-200 ℃,and increases with temperature increasing.

关 键 词：金刚石/铜复合材料 铬膜 热导率 热膨胀系数 表面改性 

分 类 号：TB333[一般工业技术—材料科学与工程]