International Conference on
Barcelona, Spain
Carbon materials such as graphite and coke are usual components of friction materials. Graphite can be either natural or synthetic, but all types converge to the flake morphology, at least at the microscopic level. The lubricant properties of graphite are intensified by metal sulfides, especially antimony trisulfide. Small particles increase the positive benefits of graphite rather than large particles. The synergy between graphite and metal sulfide can be due to a direct interaction between the two materials by means of bonds involving dangling bonds or oxygen atoms of graphite edges, which may prevent oxidation and anchor graphite basal plane to the contact disk surface.
