纤维相复合Cu-Ag合金组织、性能及合金化的研究与发展

介绍了纤维相复合强化Cu-Ag合金导体材料复合纤维组织形成方法、力学性能、导电性能及微合金化等方面的研究现状,提出了存在的问题及发展方向.纤维相复合强化Cu-Ag合金中的纳米双相纤维复合组织依靠强烈冷变形过程原位形成,具有优良强度和电导率,材料成分、应变程度、中间热处理及最终热处理决定材料中溶质固溶程度、两相比例、组织组成物体积分数、显微组织形态及纤维组织分布,进而决定纤维复合组织中的应变硬化水平及电子散射行为.添加某些第三组元能够改善合金强度但同时降低电导率.为促进这种新型导体材料进一步发展并应用,应继续深入研究不同条件下材料的强化规律、导电行为及制造技术.

Research and Development on Microstructure, Properties and Alloying of Cu-Ag Filamentary Composites

An overview of the microstructure evolution, mechanical properties, electrical conductivity and microalloying is presented and some further research fields are suggested for Cu-Ag microcomposites. The nanostructures of filamentary morphology in these microcomposites can be obtained by heavy deformation. Both the mechanical and electrical properties depend upon the material composition, strain degree, intermediate heat treatments and final annealing processes. These factors strongly affect the solute solubility, phase proportion, microstructure component volume, microstructure morphology, filamentary distribution and consequently strain hardening level and electron scattering behavior. Optimum technology of materials preparation can result in high strength and conductivity. Some third constituents added to the alloys improve the strength but generally decrease the conductivity. It is considered that the relative mechanisms responsible for strain strengthening and electron conducting and the processes for material preparation should be further investigated for the development and application of the microcomposites.