Friction and Wear Characteristics of Automotive Friction Materials Containing Different Relative Amounts of Solid Lubricants(Graphite, MoS$_2$and $_2$S$_3$)

고체윤활제(Graphite, MoS$_2$, Sb$_2$S$_3$)의 상대량에 따른 마찰재의 마찰 및 마모특성에 관한 연구

The effects of solid lubricants on wear and friction characteristics of friction materials were studied using a pad-on-disk type friction tester. Friction materials with ten formulations containing different relative amounts of solid lubricants(graphite, MoS$_2$and Sb$_2$S$_3$) were investigated. Results of this work showed that each formulation with different relative amounts of the lubricants had unique friction characteristics. At low brake temperatures, friction materials containing rich graphite showed a small amount of $\mu$ change during sliding. At elevated temperatures, on the other hand, friction materials with rich Sb$_2$S$_3$and graphite showed smaller $\mu$ changes suggesting complementary lubrication of Sb$_2$S$_3$and graphite during sliding. However, the friction materials with rich Sb$_2$S$_3$showed a large amount of wear.