碳纤维增强铜基复合材料的界面行为及其对性能的影响

项目名称： 碳纤维增强铜基复合材料的界面行为及其对性能的影响

项目编号： No.51201020

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 金属材料学科

项目作者： 冉旭

作者单位： 长春工业大学

项目金额： 25万元

中文摘要： 本项目通过机械合金化、复合镀和放电等离子烧结技术合成碳纤维增强的石墨/铜基复合材料，研究制备过程中的关键基础理论问题，包括：① Cu与C（CF）之间的润湿原理与界面行为；② 烧结致密化过程中各级界面结构演变规律；③ 界面行为与性能匹配的规律等。达到的目标：① 揭示碳纤维表面处理过程中镀层润湿动力学机制和界面结合特征；② 研究过饱和固溶体"铜包碳"形貌，提供改善C/Cu界面润湿性的新方法；③ 探索脉冲电流作用下组织状态和界面结构的演变行为，揭示不同致密化方式影响界面结合的内在机制，及其对材料性能的影响规律；④建立起微观的界面特征与力学性能、电学性能和摩擦磨损性能之间的内在联系，从微观层次和宏观性能的角度揭示出材料复合的本质及其决定因素。并在此基础上，提出机械激活和脉冲电流作用下电场放电激活的双重激活作用机制，为发展先进的纤维增强金属基复合材料及其制备新技术奠定必要的理论基础。

中文关键词： 纤维增强；铜基复合材料；界面行为；放电等离子烧结技术；性能

英文摘要： Cu base composites are considered to have great potential in application as a novel kind of advanced material due to combinations of high strength, conductivity, thermal conductivity similar to pure Cu, and good erosion resistance to electricity arc as well as excellent wear resistance. One of the most important applications is the Cu base self-lubrication composite fabricated by adding solid lubricant into Cu alloy matrix. C(F)/Cu composite specially is always the priority for the electric contacts and brush materials, but the interface between the C and the Cu matrix exists in the form of mechanical bonding, this kind of low bonding strength often leads to the enforcement pulling out and falling out. Therefore, the improvement of strength, hardness and wear resistance has been the central task for the research and development of Cu base materials. This project means to synthesize the copper matrix composites reinforced with graphite and carbon fiber by mechanical alloying, composite plating and spark plasma sintering (SPS), and study on the crucial basic theoretic issues during preparation process, including: ① the wetting theory and interfacial characteristic; ② the development regularity of the interfacial structures at all levels during the densification of the C(F)/Cu composites sintering; ③ the disciplin

英文关键词： fiber reinfored；Cu matrix composite；Interfacial behavior；Spark plasma sintering(SPS)；property