Copper-Free Resin-Based Braking Materials:A New Approach for Substituting Copper with Fly-Ash Cenospheres in Composites  

作　　者：Kaikui Zheng Youxi Lin Shanmin You Zhiying Ren Jianmeng Huang 

机构地区：[1]School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China [2]National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023,China

出　　处：《Chinese Journal of Mechanical Engineering》2024年第2期401-412,共12页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant No.52275178);Fujian Provincial Natural Science Foundation of China(Grant Nos.2020J05115,2022J01073);Project National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology of China(Grant No.202103).

摘　　要：Copper particles emitted from braking have become a significant source of environmental pollution.However,copper plays a crucial role in resin-based braking materials.Developing high-performance braking materials without copper has become a significant challenge.In this paper,the resin-based braking materials were filled with flyash cenospheres to develop copper-free braking materials.The effects of fly-ash cenospheres on the physical properties,mechanical and friction and wear properties of braking materials were studied.Furthermore,the wear mechanism of copper-free resin-based braking materials filled with fly-ash cenospheres was discussed.The results indicate that the inclusion of fly-ash cenospheres in the braking materials improved their thermal stability,hardness and impact strength,reduced their density,effectively increased the friction coefficient at medium and high temperatures,and enhanced the heat-fade resistance of the braking materials.The inclusion of fly-ash cenospheres contributed to the formation of surface friction film during the friction process of the braking materials,and facilitated the transition of form from abrasive wear to adhesive wear.At 100-350℃,the friction coefficient of the optimal formulation is in the range of 0.57-0.61,and the wear rate is in the range(0.29-0.65)×10^(-7) cm^(3)·N^(-1)·m^(-1),demonstrating excellent resistance to heat-fade and stability in friction coefficient.This research proposes the use of fly-ash cenospheres as a substitute for environmentally harmful and expensive copper in brake materials,which not only improves the performance of braking materials but also reduces their costs.

关 键 词：Fly-ash cenospheres Braking materials Friction and wear Heat-fade resistance Wear form 

分 类 号：TB333[一般工业技术—材料科学与工程]