Process of applying a specular surface finish to a carbon-carbon

Details Process of applying a specular surface finish to a carbon-carbon Process of applying a specular surface finish to a carbon-carbon

1990-03-09

1991-06-18

Tentoni, Leo B.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156327, 156334, 264 12, 264 19, 264 295, 264 297, 264232, 350641, 423449, 427162, 427228, 427279, 4273855, 4274071, B05D 302, B05D 506, B32B 3112, G02B 508

Patent

active

050247107

ABSTRACT:
A novel method is disclosed for producing specular surfaces, composed of pure carbon, on carbon-carbon composites of arbitrary weave configuration. The method utilizes a thin sheet of fine grained polycrystalline graphite as a stress-isolating interlayer between the composite substrate and the specular surface layer. The interlayer is bonded to the carbon-carbon substrate with a high char yield carbonizable adhesive. An outer layer of glassy carbon is then applied using a high char yield resin solution or (lacquer). The resulting assembly is then carbonized to convert all uncarbonized polymer to carbon. The interlayer prevents the propagation of the substrate carbon-carbon composite's crack structure to the glossy carbonized polymer surface thus formed, resulting in a high degree of specularity and zero gas permeability.

REFERENCES:
patent: 4451119 (1984-05-01), Meyers et al.
patent: 4772111 (1988-09-01), Shimura et al.
patent: 4814232 (1989-03-01), Bluege et al.
patent: 4915494 (1990-04-01), Shipley et al.

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