Procédé pour améliorer la tenue à l'oxydation d'un matériau composite à renfort fibreux et à matrice verre, vitrocéramique ou céramique

According to the invention a reinforcing fibre of nonoxide ceramic or carbon type for the manufacture of a composite material with a glass, vitroceramic or ceramic matrix is treated by a process which includes the stages consisting in: if necessary, oxidising the fibre at the surface or depositing t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SAUGNAC FREDERIC, LARNAC GUY
Format:	Patent
Sprache:	fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS BASED THEREON COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL PROCESSES OF COMPOUNDING GLASS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL JOINING GLASS TO GLASS OR OTHER MATERIALS LIME, MAGNESIA METALLURGY MINERAL OR SLAG WOOL NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS REFRACTORIES SLAG SPINNING SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE WORKING-UP
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Beschreibung
Zusammenfassung:	According to the invention a reinforcing fibre of nonoxide ceramic or carbon type for the manufacture of a composite material with a glass, vitroceramic or ceramic matrix is treated by a process which includes the stages consisting in: if necessary, oxidising the fibre at the surface or depositing thereon a layer of the same composition but including oxygen; introducing the fibre into a vessel for chemical deposition in vapour phase; performing a pretreatment at a temperature of 850 to 1250 DEG C in the presence of hydrogen at a pressure of 50 to 300 mbar; injecting a mixture of inert carrier gas and ammonia; stopping the injection and adjusting the pressure to a value of 1 to 10 mbar; injecting AlCl3 in an inert diluent gas; performing a deposition of AlN on the fibre by simultaneous injection of a mixture of AlCl3 and of inert carrier gas and of a mixture of NH3 and of inert carrier gas until the desired thickness of AlN is obtained; after stopping the injection cooling under a stream of inert gas; and recovering the fibre. Application to the manufacture of composite materials exhibiting good resistance to oxidation.