碳纤维混杂铜网增强碳复合材料制备及其载流摩擦磨损性能

Research on preparation technologies and tribological behaviors under electrical current is still one of the essential problems in the construction of high-speed electrified railway in the world. Based on the previous work including manufacturing of carbon fiber fabric mixed with copper mesh and densitification technique, a new idea that carbon(including carbon fiber and matrix) and copper are coupled but continued will be put forward . The preform structures will be further optimized by adjusting copper content, diameters and distribution of copper wire/mesh pores, as well as the needling method. And the structures and growth mechanism of pyrolytic carbon (PyC) in the preforms and the interface states will be deeply investigated.By comparison of their mechanical properties, electrical peformances, thermal behaviors and wear properties under electrical current, the preparation method for copper mesh mixing carbon fiber fabric reinforced carbon composites will be finally optimized and obtained. Through investigation of the relationships among wear processes, worn surface and microstructures, wear mechanism under electrical current of carbon fiber,copper mesh mixing reinforced composites will be revealed. This research, which may provide the research and design for pantograph sliders with sufficient theoretical guidances and technical supports, possesses significant academic value and a bright application prospect.

高速列车受电弓用滑板材料的制备技术及其载流摩擦磨损性能的研究，是世界高速电气化铁路建设的关键课题和难题之一。本项目在前期初步设计的碳纤维混杂铜网预制体和基体碳增密技术基础上，设计了碳相、铜相相互耦合的双联通结构，提出了制备新一代高速列车滑板材料的新思路。进一步优化碳纤维混杂铜网预制体结构（铜含量、铜丝直径、铜网网径、铜丝排列方式及针刺方式等），研究预制体内热解碳结构控制及界面结合状态，改善铜/碳界面，探讨热解碳生长机制；通过对材料力学性能、电性能、热物理性能、载流磨损性能的对比分析，优化获得一种高性能碳纤维混杂铜网增强碳复合材料制备方法；研究材料载流摩擦磨损过程、磨损表面及与微观结构的关系，揭示其载流摩擦磨损机制。项目研究将为新一代高速列车滑板的研究和设计提供理论指导和方法基础，具有重要的学术价值和应用前景。

我国高速铁路飞速发展，高速电力机车列车关键部件、易损件——受电弓滑板仍需进口，其制备技术是高速电气化铁路建设的关键课题和技术难点。碳纤维增强碳、铜（C/C-Cu）复合材料是一种多组元、多种物相组成的复合材料，是最具前景的高性能滑动导电材料，然其制备技术和载流摩擦磨损机理有待深入研究。本项目在前期设计的碳纤维混杂铜网预制体和基体碳增密技术基础上，设计了碳相、铜相相互耦合的双联通结构，提出了制备新一代高速列车滑板材料的新思路。项目进一步优化碳纤维混杂铜网预制体结构，分别采用化学气相沉积、树脂/沥青浸渍-炭化工艺制备了不同结构的碳纤维混杂铜网增强碳复合材料，研究预制体内热解碳结构控制及界面结合状态，初步探讨了热解碳生长规律与机制；系统研究了材料力学性能、电性能、热物理性能、载流磨损性能及其与微观结构的关系，优化获得了高性能碳纤维混杂铜网增强碳复合材料制备方法；详细研究了材料载流摩擦磨损过程、磨损表面及与微观结构的关系，揭示其载流摩擦磨损机制。项目研究为新一代高速列车滑板的研究和设计提供理论指导和方法基础，具有重要的理论意义和应用价值。