Oxidation-inhibited carbon-carbon composites

Details Oxidation-inhibited carbon-carbon composites Oxidation-inhibited carbon-carbon composites

1987-08-03

1989-01-03

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

264 295, 264 297, 423278, 423414, 4234472, 427228, 427402, 428240, 428269, 428408, B32B 900, B32B 3100

Patent

active

047956771

ABSTRACT:
Carbon-carbon composites consisting of graphite fibers reinforcing a carbon matrix are protected from oxidation by a B.sub.2 O.sub.3 glass coating which includes a refractory oxide to stabilize the viscosity of the glass. Precursors of B.sub.2 O.sub.3 and the refractory oxide are dispersed into a resin, the resin is used to impregnate fibrous graphite or fibrous graphitizable material, the sheets are laid up as plies and the laid-up plies are carbonized and graphitized using heat structure. The composite structure is then coated with an additional mix of resin and precursors and the coated structure is heated to carbonize the resin and leave a seal coat on the structure. Then an outer shell of a refractory material is deposited on the structure.

REFERENCES:
patent: 4429003 (1984-01-01), Fredriksson et al.
patent: 4439382 (1984-03-01), Joo et al.
patent: 4442165 (1984-04-01), Gebhardt et al.
patent: 4515847 (1985-05-01), Taverna et al.
patent: 4668579 (1987-05-01), Strangman et al.

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