稀土La2O3对Al2O3/Cu复合材料组织和显微硬度及导电性能影响  

Effect of La2O3 on Microstructure,Micro-hardness and Electrical Conductivity of Al2O3/Cu Composite Materials

作　　者：许萍[1,2] 翟景宇 刘慧敏 张瑞英[1,2] XU Ping;ZHAI Jing-yu;LIU Hui-min;ZHANG Rui-ying(Collage of Materials Science and Engineering,Inner Mongolia University of Technology,Huhhot 010051,China;Iinner Mongolia Engineering Research Center of Multi-functional Copper-based Materials,Huhhot 010051,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]多功能铜材料内蒙古自治区工程研究中心,内蒙古呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2019年第5期345-348,共4页Journal of Inner Mongolia University of Technology：Natural Science Edition

摘　　要：采用原位反应近液相线铸造法制备了Al2O3/Cu复合材料并在该复合材料中添加La2O3,研究La2O3对Al2O3/Cu复合材料的组织结构、显微硬度以及导电性能的影响.结果表明,在La2O3-Al-CuO体系中的原位反应产物主要为Al2O3、CuAlO2、LaAlO3等化合物.稀土La2O3对Al2O3/Cu复合材料的铸态组织具有明显的细化作用,当La2O3的添加量达到0.5wt%时,组织最为细小,显微硬度达到最大值68.7HV;但加入La2O3,使得Al2O3/Cu复合材料的导电性下降.The Al2O3/Cu composite materials were prepared by in-situ reaction near-liquid line casting method,and La2O3 was added to the composite material.The effects of La2O3 addition on the structure,microhardness and electrical conductivity of Al2O3/Cu composite materials were studied.The results show that the reaction products in La2O3-Al-CuO system are mainly Al2O3,CuAlO2 and LaAlO3.With the addition of La2O3,the as-cast microstructure of Al2O3/Cu composite material is obviously refined.When the amount of La2O3 is 0.5 wt%,the microstructure is the finest and the micro-hardness reaches the maximum of 68.7 HV.However,the electrical conductivity of Al2O3/Cu composites decreases with the addition of La2O3.

关 键 词：LA2O3 铜基复合材料 原位反应 

分 类 号：TB333.1+2[一般工业技术—材料科学与工程]