The Effect of Solid Lubricants on Friction Characteristics

Friction materials with three different formulations containing different solid lubricants were investigated to study the role of lubricants on the friction performance. The three friction materials contained 10 vol.% graphite, 7 vol.% graphite + 3 vol.% Sb₂S₃, and 7 vol.% graphite + 3 vol.% MoS₂, respectively, with the same amount of other ingredients. Results of this work showed that each formulation had advantages and disadvantages. The friction materials containing two lubricants (graphite + MoS₂ or Sb₂S₃) showed better resistance to fading and improved friction stability than the friction material containing only graphite. However, the friction materials with two lubricants showed disadvantages on anti-fading, wear resistance, and DTV generation.