Effect of mass fraction of granulated carbon black on properties of Cu-Fe friction material

Abstract:

_{:The carbon black granulated granules were prepared by dry pressing and sieving granulation.The effects of the mass fraction of carbon black on the microstructure, mechanical properties and tribological properties of Cu-Fe friction materials were studied. The results show thatthe carbon black granulated granules were easy to be pressed into strip shape.When the mass fraction of granulated carbon black is low, it can form a complete interface with the metal matrix, and the interface was prone to form holes and cracks when the content is high.With the increase of the the mass fraction of granulated carbon black, the friction coefficient and the wear loss decline initially and then increases,while the bending strength and compressive strengthof the materials show the opposite trend.In particular,When the mass percentage of granulated carbon black is 5%, the friction material exhibits the highest mechanical properties, the lowest friction coefficient, the minimum wear loss and the best comprehensive performance.}

Key words:granulated carbon black; flake graphite; composition ratio; tribological properties