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AssigneeSociete European De Propulsion
InventorsJacques Thebault, Alain Seron, Francois Beguin
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A ceramic material based on Sialon, in particular on .beta.'-Sialon is obtained by reducing an aluminosilicate precursor by means of a gas phase comprising a mixture of hydrogen and nitrogen doped with a gaseous carbon compound. The gaseous carbon compound is a gas containing carbon in combined form, e.g. an alkane, and its concentration by volume in the gas is less than 3%. The method is particularly suitable for forming Sialon-based coatings on substrates that are solid or fibrous. For composite materials constituted by a fiber preform densified by means of a matrix, the method can be used to form an interphase coating on the fibers of the preform prior to densifying the preform, or the method can be used to form a matrix that is based on Sialon.
A method of obtaining a Sialon-based ceramic material, comprising the steps of providing an aluminosilicate material and reducing said aluminosilicate material, wherein the aluminosilicate material is reduced by a gas phase comprising a mixture of hydrogen and of nitrogen doped with a gaseous carbon compound, with said aluminosilicate material remaining substantially free of solid elemental carbon.
The method of forming a Sialon-based ceramic coating on a refractory substrate, comprising the steps of:
The method of forming a Sialon-based ceramic coating on fibers of a refractory fiber substrate, comprising the steps of:
Dependencies are inferred from the claim text.