Physicochemical and Tribological Properties of Graphite/Epoxy Resin Composites
Solid self-lubricating materials have the characteristics of low friction,high wear resistance,maintenance-free and environmental protection,and become more and more popular in the market.In this paper,to prepare graphite/epoxy resin self-lubricating composites,epoxy resin was selected as the matrix material and high-purity flake graphite was used as the lubricant.The physicochemical properties of graphite/epoxy resin mixtures such as viscosity,curing temperature and glass transition were studied by using Anton Paar rheometer and differential scanning calorimeter.The Shore A hardness and tribological properties of graphite/epoxy resin composites were studied by using automatic Shore hardness tester,friction and wear testing machine and white light interferometry three-dimensional surface profiler.The relationships among the graphite mass fraction,physicochemical properties,and tribological properties of composites were discussed.The results show that the Shore A hardness of 5％graphite/epoxy resin composite is the highest.With the increase of graphite mass fraction,the material viscosity increases,and the glass transition temperature decreases first and then increases slightly.The change of graphite mass fraction does not affect the material curing temperature.The increase of graphite mass fraction generally reduces the frictional coefficient of the material.The depth of wear track becomes shallower with the increase of graphite mass fraction and deepens with the increase of load.The research results provide technical supports for the applications of self-lubricating graphite/epoxy resin composites.
万方数据
维普
