Impact of CPR/NR and High Performance Filler on Tribological Properties of Composite Friction Material
GONG Qianjiang1,2,3,XU Xiang1,2,3, YANG Ming1,2,3, ZHANG Shiwei1,2,3,XIAO Rui1,2,3
1 The Materials Science and Metallurgy Engineering College, Guizhou University, Guiyang 550025; 2 The Key Laboratory for Mechanical Behavior and Microstructure of Materials, Guizhou University, Guiyang 550025; 3 The National & LocalJoint Engineering Laboratory for High-performance Metal Structure Materials and Advanced Manufacture Technology, Guizhou University, Guiyang 550025
Abstract: The high friction composite material was prepared by dry-hot molding process using the high performance filler as main filler. Then the influences of high performance filler and mass ratio of cashew oil modified phenolic resin to nitrile rubber on the properties of composite materials were discussed. The properties of high friction composites material were tested. And the heat resistance performance was analyzed by thermal analyzer. The surface morphology of composites were observed and analyzed by laser scanning confocal microscopy (LSCM) and scanning electron microscopy (SEM). The results showed that the density, compressive strength, compressive modulus and hardness of the composites increase with the decrease of the rubber content, which is adverse to the impact strength. The reduction of rubber content facilitate to prompt heat resistance property, secondary contact areas, and to reduce friction coefficient and wear rate. Under a relatively low content of high performance filler, the large and continuous contact plateaus is formed on the surface of the material which causes the decrease of friction coefficient and wear rate were also reduced, and the main wear forms are adhesive wear and abrasive wear. The formation of secondary contact plateaus is hindered while the friction coefficient and specific wear rate gradually increases with the increase of filler content, and the main wear form of material transformed into abrasive and fatigue wear.
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2018, Vol. 32 
