Abstract:
Using electrolytic copper powder and graphite powder as raw materials, anionic emulsified asphalt as binder, the Cu-graphite-emulsified asphalt composites were prepared by powder metallurgy technology, and XRD, EDS and SEM were used to characterize the microstructure of Cu-graphite-emulsified asphalt composites with graphite content of 2wt%-8wt%. The friction and wear properties, mechanical and electrical properties of Cu-graphite-emulsified asphalt composites were studied, and compared with those of Cu-graphite composites without emulsified asphalt. The results show that emulsified asphalt can effectively prevent the aggregation of graphite particles and has a bonding effect on the graphite and Cu matrix; At the interface of the two phases, there is almost no gap and layered graphite being produced; The sample with 4wt% graphite has minimum wear loss of only 0.0049 g, and the friction coefficient is about 0.025; Increasing the load and graphite content will increase the wear loss, but it can reduce the friction coefficients; During sliding friction, cracks, chutes, depressions, small particles and lamellar structures will appear on the worn surface, but the extent is lower than that of composites without emulsified asphalt.