Research/Patents/US 4791076
US 4791076

GRAPHITE FIBER REINFORCED SILICA MATRIX COMPOSITE

Assignee

HUGHES AIRCRAFT COMPANY, A DE CORP

Filed

Aug 2, 1984

Granted

Dec 13, 1988

Location

El Segundo CA (Aerospace Corp/TRW)

Abstract

A graphite fiber reinforced silica matrix composite comprising a plurality of graphite fibers bonded together in a silica matrix comprised of silica, boron phosphate and beta-spodumene modified with a minor amount of an alkaline earth metal oxide is disclosed. The extremely low, nearly zero, coefficient of thermal expansion coupled with the moderate thermal conductivity and low density of the composite make the composite particularly suitable as a substrate material for high energy laser mirrors.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Oct 18, 1985

Rescinded

Jun 9, 1988

Duration

2 years, 7 months

Inventor

  • 1HYMAN LEGGETT

Sensitive facility: El Segundo CA (Aerospace Corp/TRW)

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records