Coating for fibrous carbon material in boron containing composit

Details Coating for fibrous carbon material in boron containing composit Coating for fibrous carbon material in boron containing composit

1978-04-24

1979-08-14

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

427228, 428289, 428366, 428367, 428375, 428408, B32B 900

Patent

active

041646010

ABSTRACT:
Fibrous carbon material such as graphite cloth which is to be combined with a thermosetting resin and a boron containing compound to form a carbon-carbon composite is provided with a protective coating consisting of cured furfuryl alcohol copolymers. When formed into a laminate and heated to at least 2150.degree. C. to carbonize and at least partially graphitize the thermosetting resin, the boron greatly increases the interlaminar tensile strength while the coating protects the fibrous material from adverse effects of the boron which reduce the tensile strength in the directions of the fibers of the fibrous carbon material of the composite.

REFERENCES:
patent: 3672936 (1972-06-01), Ehrenreich

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