(东南大学 材料科学与工程学院，南京 211189)
摘 要: 采用原位变形法制备Cu-8%Fe，Cu-12%Fe和Cu-16%Fe(质量分数)3种复合材料，利用金相显微镜和扫描电镜观察各材料的显微组织，利用拉伸试验和双臂电桥分别对力学性能和导电性能进行研究，并与经相同加工过程的纯铜材料进行对比。结果表明：在形变加工过程中，Cu-Fe复合材料中的Fe相由枝晶状逐渐变成沿形变方向的纤维状结构；随应变量逐渐增加，纤维逐渐增长，间距和宽度逐渐减小，分布趋于均匀，排列方向趋于一致；且随着应变量的增加，Cu-Fe复合材料的硬度和屈服强度呈上升趋势，塑性和导电性能呈下降趋势；退火后其屈服强度下降，导电性能增强。
关键字: Cu；Fe；复合材料；力学性能；导电性能
conductivity properties of Cu-Fe composites
（School of Materials Science and Engineering, Southeast University, Nanjing 211189, China）
Abstract:Cu-8%Fe, Cu-12%Fe and Cu-16%Fe (mass fraction) composites were prepared by in-situ synthesis technique and heavy deformation processing. Metallography microscope and scanning electron microscope were used to observe the microstructures of the Cu-Fe composites. The mechanical properties and electrical conductivity were studied by tensile test and double bridge, respectively. The three Gu-Fe composites were compared with pure copper treated in the same way. The results show that, during the deformation process, the primary and second dendritic arms of Fe phase are aligned along the drawing direction and elongated into filaments. With increasing drawing strains, the filaments become longer and thinner, and the space between them is shortened, and their orientations are gradually in good order. The improvement of hardness and yield strength results in heavy deformation, whereas the plasticity and electrical conductivity decrease. After annealing, the yield strength of Cu-Fe in-situ composites decreases, and the conductivity property increases.
Key words: Cu; Fe; composites; mechanical properties; conductivity property
