Effects of Bond Characteristics on The Performance of Carbon Based Composite

Several resin based composites were prepared by filling of graphite, carbon black and coke in phenolic resin, NBR modified phenolic resin and polytetrafluroethylene (PTFE) as the bonding agents. The specific resistivity of the composites was measured, while their friction and wear behavior sliding against copper examined on an MM 200 friction and wear tester. The morphologies of the worn surfaces of the composites were observed with a scanning electron microscope, while the worn surface morphology of the counterpart copper observed with an optical microscope. As the results, the hardness and wear resistance of carbon filled modified phenolic resin based composite are lower than those of the filled phenolic resin based composite, though the corresponding counterpart copper in the former case experiences decreased wear. The main wear mechanisms of the composites include adhesion wear, abrasive wear, and scuffing. Sine the filled PTFE based composite registers the best wear resistance and the lowest wear of the counterpart copper ring, it would be a promising candidate as a novel advanced electric brush material.