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http://dx.doi.org/10.9725/kstle.2009.25.1.061

Tribological Properties of Semi-metallic Brake Friction Materials Containing Different Solid Lubricants: Graphite, $WS_2$, and $MoS_2$  

Jang, Ho (Dept. of Materials Science and Engineering, Korea University)
Shin, Min-Wook (Dept. of Materials Science and Engineering, Korea University)
Kim, Yun-Cheol (Materials Research Team, Advanced Technology Center, R&D Division for Hyundai Motor Company and Kia Motors Corporation)
Chung, Dong-Yoon (Dept. of Weapons and Mechanical Engineering, Korea Military Academy)
Publication Information
Tribology and Lubricants / v.25, no.1, 2009 , pp. 61-65 More about this Journal
Abstract
Tribological properties of the semi-metallic friction materials containing different solid lubricants (graphite, $WS_2$, $MoS_2$) 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 $WS_2$ and $MoS_2$. At intermediate temperature ranges, however, friction materials with $WS_2$ or $MoS_2$ maintained higher friction effectiveness than that of graphite. On the other hand, friction materials containing $MoS_2$ showed increased wear rates than that with graphite or $WS_2$. 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.
Keywords
brake; fade; friction coefficient; friction materials; solid lubricants; wear;
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