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AssigneesAerospatiale Societe Nationale Industrielle, Niigrafit Research Institute
InventorsSergey Anatoljevich Kolesnikov, Valery Ivanovich Kostikov, Alexander Victorovich Demin, Lyubov Semenovna Kondratova, Alexander Mikhailovich Vasiljev
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The invention relates to a heat-insulating structural carbon material and the process for producing thereof. This heat-insulating structural material is prepared from a suspension of discrete carbon fibers in a viscoplastic liquid such as polyglycol, glycerine and petroleum oils, by molding a preform and orienting discrete filaments, followed by baking the preform and depositing pyrolytic carbon in the porous structure thereof. This heat-insulating material comprises a coke matrix, discrete carbon filaments, the coke matrix as a porous film-like structure of coke residue on said filaments, and pyrolytic carbon.
A process for producing a carbon structural thermal insulator, and comprising, preparing a suspension of discrete carbon fibers by mixing said fibers while agitating said fibers in a dispersive liquid, each of said discrete carbon fibers being made of a plurality of discrete filaments, molding a preform and orienting said discrete filaments, eliminating part of said dispersive liquid, and baking said preform in a mold, wherein said dispersive liquid is a non-water-containing viscoplastic liquid having a good wettability compared to components of said suspension, during preparation of said suspension said carbon fibers are mixed and agitated in said viscoplastic liquid until the fibers separate into said filaments such that said filaments are uniformly distributed by carbonizing said viscoplastic dispersive liquid in said preform, a porous structure of coke residue is formed on said filaments and additional rigidity is given to said preform after molding and baking of said preform by depositing pyrolytic carbon in the porous structure of said preform.
Dependencies are inferred from the claim text.