A composite body of silicon carbide and binderless carbon...

Details A composite body of silicon carbide and binderless carbon... A composite body of silicon carbide and binderless carbon...

C - Chemistry, Metallurgy

04

B

C04B 35/565 (2006.01) C04B 35/64 (2006.01) F16J 15/34 (2006.01) C01B 31/02 (2006.01) C01B 31/36 (2006.01)

Patent

CA 2480156

A composite body of silicon carbide having binderless, allotropic carbon granules distributed throughout is produced. The nominal size of the binderless allotropic carbon granules can range from 5 to 500 micrometers. The concentration of the binderless allotropic carbon particles can vary from 1.0 to 35.0 weight percent. The process to produce such a composite body is to sinter silicon carbide with binderless, carbon-yielding precursor granules. The composite body is utilized in tribological applications. The dense, impervious silicon carbide-binderless carbon composite exhibits excellent physical and tribological characteristics when used as a mechanical face seal, a sliding bearing arrangement, or some other rubbing component.

L'invention concerne la production d'un corps composite de carbure de silicium comprenant des granules de carbone allotropique sans liant, réparties dans tout le corps. La taille nominale des granules peut aller de 5 à 500 micromètres. La concentration de particules de carbone allotropique sans liant peut varier entre 1,0 et 35,0 pour-cent en poids. Le procédé permettant de produire un tel corps composite consiste à fritter du carbure de silicium avec des granules précurseurs producteurs de carbone. Ce corps composite est utilisé dans des applications tribologiques. Ce composite carbure de silicium-carbone sans liant dense et imperméable présente d'excellente caractéristiques physiques et tribologiques lorsqu'il est utilisé en tant que joint mécanique, en tant qu'ensemble palier lisse, ou dans un autre composant de frottement.

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