High temperature ceramic composite
AssigneeMinnesota Mining and Manufacturing Company
InventorRobert G. Smith
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Abstract
This invention provides a shaped ceramic composite article comprising ceramic oxide fiber(s), a first coating comprising a carbonaceous matrix which includes boron nitride particles in contact therewith, and a second coating comprising silicon carbide. The inventive composite article is useful in applications requiring good heat resistance and mechanical properties, such as gas fired radiant burner tubes, gas burner nozzle liners, heat exchangers, thermowells, core busters or flame dispersers, and other gas fired furnace components.
Claims12
A shaped composite article comprising ceramic oxide fiber, said ceramic oxide fiber having in said composite a surface which is available for coating, a first coating at least partially covering said surface of said ceramic oxide fiber available for coating to provide a surface which is available for overcoating, and a second coating at least partially covering that portion of said surface which is available for overcoating, wherein said first coating comprises a carbonaceous matrix which includes boron nitride particles in contact therewith, and said second coating comprises silicon carbide, with the proviso that said second coating covers at least a portion of said first coating.
Dependencies are inferred from the claim text.