Method for producing fabricated parts based on .beta.-sic...

Details Method for producing fabricated parts based on .beta.-sic... Method for producing fabricated parts based on .beta.-sic...

C - Chemistry, Metallurgy

04

B

C04B 35/573 (2006.01) C25C 3/08 (2006.01) F23G 5/48 (2006.01)

Patent

CA 2566869

The invention relates to a method for producing a composite material based on .beta.-SiC, said method comprising the following steps: (a) a precursor mixture is prepared, said mixture comprising at least one .beta.-SiC precursor with at least one, preferably thermosetting, carbonated resin, (b) the precursor mixture is fabricated, especially in the form of granulated material, plates, tubes or bricks, in order to form an intermediate part; (c) the resin is polymerised; (d) said intermediate parts are introduced into a receptacle; (e) said receptacle is closed by a closing means in such a way that an over-pressure can escape; and (f) the intermediate parts are thermally treated at a temperature of between 1100 and 1500 °C in order to eliminate the organic constituents of the resin and to form .beta.-SiC in the final part.

L'invention concerne un procédé de fabrication d'un matériau composite à base de .beta.-~SiC comprenant (a) la préparation d'un mélange dit « mélange précurseur » comprenant au moins un précurseur du .beta.-SiC avec au moins une résine carbonée, de préférence thermodurcissable, (b) la mise en forme dudit mélange précurseur, notamment en granulés, plaques, tubes ou briques, pour former une pièce intermédiaire ; (c) la polymérisation de la résine ; (d) l'introduction desdites pièces intermédiaires dans un réceptacle ; (e) la fermeture dudit réceptacle par un moyen de fermeture laissant échapper une surpression de gaz ; (f) le traitement thermique desdites pièces intermédiaires à une température entre 1100 et 1500~C pour éliminer les constituants organiques de la résine et former du .beta.-SiC dans la pièce finale.

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