Infiltration of Porous Materials: Metal-Graphite Composites

© Fraunhofer IFAM
Graphite pre-form infiltrated with aluminum

The demand for performance and efficiency increases in bearing applications, for example for increased rotational speed in aircraft turbines. In this case higher operation and emergency mode temperatures need to be possible. Bearings currently consist of, among others, polyimide, a polymer material that can be used at higher temperatures yet begins to degrade during use and thus does not offer sufficient reliability.

To increase the service life of bearings, for example in aircraft engines, novel temperature-stable materials are necessary.