Components for high performance

Automotive engineering
– Drive

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One component assembly that has to withstand pronounced wear stress in a manual gear-change motor vehicle is the clutch, and especially the friction linings. With increasing stress on account of the high engine torques common today, it is necessary to size these components to be big enough, for example, for operation in a single-plate dry clutch in order to ensure reliable power transmission. As the installation space for a clutch is limited, focus is on materials for friction linings that, compared to conventional linings, feature the following properties:

  • Low weight
  • High mechanical resilience to compression
  • High friction coefficient
  • High wear resistance
  • High thermal and thermomechanical stability
  • Small size

In the special research department SFB 483 at Karlsruhe Institute of Technology, oxide and non-oxide ceramic materials made of Al2O3 and SiC have proven their suitability in principle as materials for hard-wearing friction linings in clutches.

Non-oxide ceramic composites are used in racing sport and high-end sports cars. The transmission of torques >500 Nm can be realized with small component size and low weight.

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