Tribological Properties of Semi-metallic Brake Friction Materials Containing Different Solid Lubricants: Graphite, $WS_2$ , and $MoS_2$
Ho Jang, Min-Wook Shin, Yun-Cheol Kim, Dong-Yoon Chung
Abstract
Ho Jang, Min-Wook Shin, Yun-Cheol Kim, Dong-Yoon Chung
Abstract
Tribological properties of the semi-metallic friction materials containing different solid lubricants (graphite, , ) were investigated. The friction materials were fabricated with an experimental formulation and tested with gray cast iron disks. Results showed that graphite contributed to stabilize the friction coefficient during run-in processes. Also, graphite provided better fade resistance than that of and . At intermediate temperature ranges, however, friction materials with or maintained higher friction effectiveness than that of graphite. On the other hand, friction materials containing showed increased wear rates than that with graphite or . Friction materials with proper combinations of two solid lubricants showed better friction and wear properties than that of the friction materials containing single solid lubricant.
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Tribological properties of the semi-metallic friction materials containing different solid lubricants (graphite, , ) were investigated. The friction materials were fabricated with an experimental formulation and tested with gray cast iron disks. Results showed that graphite contributed to stabilize the friction coefficient during run-in processes. Also, graphite provided better fade resistance than that of and . At intermediate temperature ranges, however, friction materials with or maintained higher friction effectiveness than that of graphite. On the other hand, friction materials containing showed increased wear rates than that with graphite or . Friction materials with proper combinations of two solid lubricants showed better friction and wear properties than that of the friction materials containing single solid lubricant.
Key concepts: Materials science, Graphite, Dry lubricant, Lubricant, Tribology, Friction modifier, Friction coefficient, Composite material