内氧化法制备Cr_2O_3弥散强化铜复合材料  

Preparation of Cr_2O_3 dispersion strengthened copper composite by internal oxidation

作　　者：刘勇[1] 田保红[1] 陈卫[2] 周洪雷[1] 张大华[1] 刘平[3] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]洛阳船舶材料研究所,河南洛阳471039 [3]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471003

出　　处：《材料热处理学报》2008年第5期22-25,共4页Transactions of Materials and Heat Treatment

基　　金：河南省教育厅自然科学基金项目(2006430004);河南科技大学基金项目(2007ZY060);河南科技大学博士研究启动基金

摘　　要：采用内氧化法制备了Cu/Cr2O3弥散强化铜基复合材料,并利用SEM、TEM等分析手段对其性能和微观结构进行了分析。实验结果表明：随着内氧化时间和温度的增加,内氧化层深逐渐增大;随变形量的增加,试样硬度和抗拉强度逐渐升高,导电率略有降低;微观组织分析表明,在铜基体上弥散分布着大量细小均匀的Cr2O3颗粒,其粒径为5-20nm,颗粒间距为20-50nm。Cu/Cr2O3 composite was prepared by internal oxidation.The properties and microstructure of the composite were investigates by means of SEM and TEM.The results indicate that internal oxidation depth of the composite increases gradually with increase of internal oxidation time and temperature.The microhardness and the tensile strength of the composite increase with increasing deformation while the electrical conductivity drops slightly. The investigation of microstructure of the internal oxidation composite shows that a mass of fine Cr2O3 particles is dispersed in the copper matrix,the size of Cr2O3 particles is 5～20nm in diameter and the spatial distance between these particles is 20～50nm.

关 键 词：Cr2O3弥散铜 内氧化 显微硬度 导电率 抗拉强度 

分 类 号：TG146.11[一般工业技术—材料科学与工程]