Alliedsignal Inc.

Lawrence E McAllister

David R Snyder

Brian P Couch

Norman E Jannasch

Jaring V Veen

A method of finishing carbon fibers with phenolic triazine to promote adhesing of the carbon fibers with a resin matrix to retain up to 92% of the room temperature dry strength at a temperature of 500.degree. F.

Phenolic-triazine resin finish of carbon fibers

A carbon composite aircraft brake disc (10, 50, 60, 110, 120) is manufactured to include internally an insert member (12, 14, 18, 24, 28, 32, 36, 42, 52, 115, 125) which effects positive vibration damping for the disc (10, 50, 60, 110, 120) during operation of the brake (100). The insert member (12, 14, 18, 24, 28, 32, 36, 42, 52, 115, 125) may be a graphite material, paper, or cloth material which is introduced into the interior of material utilized for manufacturing the carbon composite aircraft disc (10, 50, 60, 110, 120). After manufacturing of the brake disc (10, 50, 60, 110, 120) is completed, the brake disc comprises a single integral carbon composite brake disc (10, 50, 60, 110, 120) having disposed completely internally therein the insert member which provides a discontinuity that effects efficiently positive vibration damping of the disc (10, 50, 60, 110, 120) during operation of the aircraft brake (100) in which the disc is located.

Carbon composite brake disc with positive vibration damping

The invention provides a method for utilizing the inherent oxygen-blocking characteristics of a barrier coating for a carbon-carbon material by penetrating cracked, porous areas of the coating with an oxygen inhibitor. The inhibitor will complex with active carbon-carbon material sites at the base of the cracks. The resulting system provides very effective oxidation protection at intermediate temperatures of approximately 650.degree. C.

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Granger, IN, United States of America

Lawrence E McAllister