Process for coating carbon fibers with a carbide, and carbon fib

Details Process for coating carbon fibers with a carbide, and carbon fib Process for coating carbon fibers with a carbide, and carbon fib

1987-12-02

1989-08-22

Morgenstern, Norman

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

4272552, 4272554, 4272555, 427 52, 428253, 428260, 428262, 428368, 428367, 428378, 428379, 428389, 428408, B32B 900, D02G 300

Patent

active

048595039

ABSTRACT:
A process for continuously coating a strand of continuous carbon filaments by means of a refractory carbide by reactive CVD deposition, which includes the step of causing the strand to travel under mechanical tension with a hermetic enclosure, simultaneously, introducing into the said enclosure a gas mixture consisting of hydrogen and of a volatile compound of an element capable of forming a refractory carbide; and heating the reaction mixture consisting of the strand and the gas mixture so that the formation of the carbide deposit on the filaments takes place by a chemical reaction between the carbon in these filaments and the gas mixture; and the reaction is self-regulated by the diffusion of carbon through the layer of carbide already formed.

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patent: 4343836 (1982-08-01), Newkirk et al.
patent: 4591514 (1986-05-01), Holzl
patent: 4668579 (1987-05-01), Shangman et al.

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