Pyrolytic Carbon Wet Friction Materials

Abstract

Carbon based friction materials continue to gain increasing acceptance in many friction applications. One unique class of carbon based friction materials is Chemical Vapor Deposited carbon fabric (CVD Fabric™) Since 1991, CVD Fabric™ has been used in production automotive wet friction applications including limited slip differentials and heavy and medium duty truck transmission synchronizers. It offers stable friction levels, low wear rates and is readily wetted by transmission oils. Because CVD Fabric does not soften with temperature and is unaffected by solvents, this high energy absorption, high abuse tolerant material may provide significant performance advantages in off-highway wet brake and clutch applications. This paper will explore the Physical, mechanical and tribological properties of CVD Fabric wet friction materials.