【作者】 宗跃； 吴玉程； 汪峰涛； 王文芳；

【Author】 ZONG Yue~1 WU Yu-cheng~2 WANG Feng-tao~2 WANG Wen-fang~2 (1.Composites Company,Hefei University of Technology,Hefei 230009,China;2.School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

【机构】 合肥工业大学复合材料公司； 合肥工业大学材料科学与工程学院；

【摘要】 采用粉末冶金法制备了不同含量的纳米 SiC 和 SiO₂颗粒增强的 Cu 基复合材料．研究了增强相含量对铜基复合材料性能的影响,比较了 n-SiC 和 n-SiO₂ 对铜的增强效果．结果表明,n-SiO₂和 n-SiC 颗粒较少含量较少时在基体中分布较为均匀,团聚较少；随着复合材料中 n-SiC 和 n-SiO₂质量分数的增加,材料的密度降低,电阻率升高,而硬度先升高后降低；两种复合材料的软化温度都达到700℃以上,远远高于纯铜的软化温度（150℃）,提高了材料的热稳定性；颗粒含量相同时, n-SiC 的对铜基体的增强效果要优于 n-SiO₂。更多还原

【Abstract】 Two kinds of Cu/SiC and Cu/SiO₂composites were fabricated by powder metallurgy method.The influence of reinforcement particles contents on the relevant properties of composites and the microstructure of Cu/SiC and Cu/SiO₂ composites was studied.The reinforcement effects of nano-SiC and nano-SiO₂ particles were compared.In addition,the results show that with the increase in the amount of nano-SiC and nano-SiO₂ particles,the density of the both composites decreases,the resistivity increases,whereas the hardness increases firstly then drops.The softening temperatures of the two kinds of composites are above 700℃,which is far higher than that of the pure copper,leading to the improvement of the thermal stability of the composites at high temperatures.Considering all factors,the reinforcement effect of nano-SiC is better than that of nano-SiO₂,when their contents are the same in the copper matrix.更多还原