氧化石墨烯增强Cu-Nb 复合线材结构及性能影响研究

本文采用粉末套管法成功制备出氧化石墨烯增强的 GO/Cu-Nb 多芯(192 芯) 复合线材及未掺杂氧化石墨烯的 Cu-Nb 多芯(192 芯) 复合线材. 通过金相、SEM 及拉曼光谱等表征不同尺寸下两种复合线材的芯丝组态、 界面特征及特征峰. 结果表明, 氧化石墨烯由于良好的自润滑特性较好地协调了芯丝与基体的变形, 其弥散分布有效阻隔了 Nb 颗粒团聚及大尺寸晶粒的产生, 芯丝变形更均匀, 形态更规则. 力学和电学性能测试结果表明, 掺杂氧化石墨烯后,Cu-Nb 复合线材的力学与电学性能均明显提升, 分析认为, 氧化石墨烯的尺寸大小、 分散均匀性及热处理是影响线材综合性能提升的主要原因.

Influence of Graphene Oxide Doping on the Microstructure and Properties of Cu-Nb Composite Wires

In this paper. G()/Cu-Nb multi-core (192-cores) composite wires reinforced with Graphene oxide and Cu-Nb multi-core (192-cores) composite wires undoped with Graphene oxide were successfully prepared by powder in tube method. The filament microstructure* interface topography and the characteristics peaks of the two composite wires under different sizes were analyzed by metallography, SEM and Raman spectroscopy, respectively. The results showed that the deformation of the core wires and the matrix was coordinated owing to the good self-lubricating property of graphene oxide. The dispersed distribution of graphene oxide effectively blocked the agglomeration of Nb particles and the generation of large-sized grains, consequently the deformation of the core wires was more uniform and the shape was more regular. The mechanical and electrical properties of the Cu-Nb composite wires are significantly improved by graphene oxide doping. The analysis indicates that the size, dispersion uniformity of graphene oxide and heat treatment temperature of wires are the main reasons for improving the comprehensive performance of the wires.