高速列车制动摩擦材料的成分协同设计及摩擦膜稳定化机制

铜基制动闸片因其摩擦磨损性能稳定、耐热性能和散热性能优异、抗粘着性好等优势，成为保证高速列车运行安全的关键部件之一。本项目针对高速下铜基制动闸片紧急制动时摩擦系数衰退及异常波动的问题，提出了综合利用复合摩擦剂的多尺度协同强化以及复合润滑剂的宽温域润滑理念协同设计闸片成分，促进摩擦膜的高强韧及高润滑以维持高速制动过程动态化稳定的新思路。为实现复合摩擦剂和复合润滑剂的最优配比设计并发挥优异的协同强化及润滑作用，重点解决高速制动过程中摩擦膜动态化稳定机制及闸片制备过程中显微组织调控的关键科学和技术问题，为高性能铜基制动闸片的设计与制备技术奠定理论和技术基础，亦将为其他摩擦制动材料的开发提供思路和借鉴。

Copper-based brake pad has become one of the key components to ensure the operation safety of high-speed railway train because of its stable friction and wear performance, excellent heat resistance and heat dissipation performance and good adhesion resistance. Aiming at the challenge of decline and abnormal fluctuation of friction coefficient of copper-based brake pad during emergency braking at high speed, this project puts forward a new idea of comprehensively utilizing the multi-scale collaborative strengthening of composite friction components and the lubrication in wide temperature range of composite lubricants to jointly design the compositions of brake pad, which promote the high strength, toughness and high lubrication of friction film and maintain the dynamic stability of high-speed braking process. In order to realize the optimal ratio of composite friction components and composite lubricants and achieve the excellent synergistic strengthening and lubrication, this project focuses on solving the key scientific and technical problems of dynamic stability mechanism of friction film in the process of high-speed braking and microstructure adjusting in the process of brake pad preparation. This work lays a theoretical and technical foundation for the design and preparation technology of high-performance copper-based brake pads, and also provide ideas and reference for the development of other friction braking materials.