Process for the production of a carbon-containing composite mate

Details Process for the production of a carbon-containing composite mate Process for the production of a carbon-containing composite mate

1993-07-08

1994-11-01

Lesmes, George F.

Coating processes

Nonuniform coating

Wrinkled or crackled coating

427249, 4272554, 427261, 427384, 428113, 428114, 428408, B05D 500

Patent

active

053606388

ABSTRACT:
A process for the production of a carbon-containing composite material part protected against oxidation. The process consists of forming a fibrous preform or blank of the part by superimposing layers of carbon-containing fibres (12), the fibres of each layer being parallel to one another and the fibres of the N outermost layers being oriented in the same plane in accordance with a first or a second direction, with N.gtoreq.2, said directions being perpendicular to one another. The preform is densified by a carbon-containing densification material. The N-1 outermost densified layers of the densified preform are chemically reacted, at a temperature above ambient temperature, with at least one chemical compound in order to form an outer coating of refractory carbonitride or carbide. The assembly is then cooled in order to form in the outer coating cracks (28) in the direction (z) of its thickness (e) issuing towards the outside, said cracks being oriented in said directions (x,y) and defining between them parallelepipedic carbide or carbonitride blocks (30), and the resulting cracks are then filled.

REFERENCES:
patent: 4500602 (1985-02-01), Patten et al.
patent: 4671997 (1987-06-01), Galasso et al.
patent: 4751258 (1988-06-01), Minami
patent: 4863773 (1989-09-01), Rousseau et al.

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