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US 4,671,911 AGranted
Ceramic composite material having a core of ceramic fibers coated with a layer of ceramic, and method of producing same
AssigneeProduits Cellulosiques Isolants-Procelis
InventorsAlbert Garnier, Alain G. de l'Eprevier
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Abstract
Ceramic composite material characterized in that it comprises a core of ceramic fibers of which at least one face is coated with a hard and dense ceramic slip covering, of which the coefficient of expansion is compatible with that of the ceramic fibers.
Claims3
A method for producing a fibrous ceramic composite material, comprising:
- forming a dry fibrous substrate of ceramic fibers;
- coating at least one face of said dry substrate with an aqueous suspension of a slip covering to form a coated product, said slip covering having a coefficient of expansion, after baking, which differs from that of said ceramic fibers of the substrate by a maximum of one percent;
- drying said coated product to remove water from said slip covering;
- and
- baking said dried coated substrate at a sufficient temperature to result in ceramization of said dried slip covering, and recrystallization and ceramization of said ceramic fibers.
2 more elements
Dependencies are inferred from the claim text.