Process for improving the oxidation resistance of a composite material with fiber reinforcement and matrix glass, ceramic or ceramic.

摘要

According to the invention, this is a reinforcing fiber ceramic Type not rust or carbon for the manufacture of a composite material of glass matrix, ceramic or ceramic by a process comprising the steps of: IF NECESSARY, oxidise FIBER SURFACE OR PUT IN A LAYER OF IT BUT same composition comprising oxygen; INTRODUCING THE FIBER IN A deposition chamber CHEMICAL VAPOR; PERFORM PRETREATMENT at a temperature of 850 to 1250 (DEGREES) C under hydrogen at a pressure of 50 to 300 mbar; Injecting a mixture of carrier gas NEUTRAL AND AMMONIA; STOPPING THE INJECTION AND REGULAR PRESSURE TO A value of 1 to 10 mbar; INJECT AICI3 IN A GAS SOLVENT NEUTRAL; MAKE A DEPOSIT IN FIBER AIN SIMULTANEOUS INJECTION OF A MIXTURE OF GAS AND CARRIER AICI3 NEUTRAL AND A MIXTURE OF NH3 AND GAS PRODUCING CARRIER NEUTRAL TO THE DESIRED THICKNESS AIN; After stopping the injection, cooled to a gas stream NEUTROY RECOVER THE FIBER. APPLICATION IN THE MANUFACTURE COMPOSITE having good oxidation resistance.