The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 1994
Filed:
Jul. 08, 1993
Jean-Michel Lequertier, St Aubin de Medoc, FR;
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.