Materials offer high thermal conductivity

These modern carbon-based materials are an excellent option for use in aircraft applications because of their high thermal conductivity, which means they excel at handling and dissipating the high temperatures found in aerospace engines. The materials also feature a low coefficient of friction, a low wear rate at high sliding speed, and resistance to oxidation in high temperature air. The materials are also strong and dimensionally stable.

“Metcar’s modern carbon-graphite materials are an excellent option to help aerospace designers meet fuel efficiency requirements,” said President and CEO, Matthew Brennan, “ Since more fuel efficient engines run hotter, they need higher temperature, more thermally conductive materials in the engine.”

Both mechanical face seals, with carbon-graphite primary rings, and circumferential seals, with carbon-graphite seal rings, are used in aircraft engines to seal the oil in the main shaft bearing sump. Lifting wedges and machined configurations are used to create lift, so that these seals run on a hydrodynamic film. Rotating speed over 10,000rpm and temperatures as high as 427°C (800°F) are accommodated. M-45 is used to reduce the seal face temperature because of its superior thermal conductivity.