Carbon-Graphites for Aerospace Seals

The special demands of aerospace applications upon carbon-graphite seal components are discussed. Carbon-graphite materials are divided into five major groups with the unique properties of each group listed.

The authors describe the influence that environment, operating conditions and seal design have on the proper grade selection. Special materials are required to obtain reliable seal performance with high vacuums, cryogenic fluids, and high temperature gases. Suggestions for handling and using these materials are included.