Aluminum nitride refractory materials and methods for making the same
AssigneeLanxide Technology Company, LP
InventorsJack A. Kuszyk, John P. Biel
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Abstract
The present invention broadly relates to novel aluminum nitride matrix ceramic composite bodies for use as refractory materials and methods for making the same. The refractory materials are useful in environments which are corrosive, erosive, abrasive and/or which generate thermal shock. Such environments include furnaces, and associated apparatus which house or contact molten masses including, for example, molten metals, molten glasses, etc. The preferred method for making the aluminum nitride matrix ceramic composites comprises a directed oxidation of molten metal.
Claims21
An article comprising at least one refractory ceramic composite body for handling molten fluids, said article selected from the group consisting of a furnace lining, a portion of a slide gate, a submerged entry nozzle, a ladle shroud, a tundish and a tap hole liner, and wherein said refractory ceramic composite body comprises:
- at least one filler material selected from the group consisting of carbides, nitrides and oxides selected from the group consisting of magnesium aluminate, zirconia, aluminosilicate and calcium silicate;
- at least one percent by volume of a metallic component comprising at least one metallic constituent;
- and
- a matrix comprising aluminum nitride embedding at least a portion of said filler material.
An article of manufacture selected from the group consisting of a tap hole liner and an insert portion of a slide gate plate, said insert having parallel faces and an aperture therethrough, said article comprising:
- at least one filler material;
- a matrix comprising aluminum nitride;
- and
- at least about 1 percent by volume of a metallic component comprising at least one metallic constituent.
An article of manufacture selected from the group consisting of a tap hole liner and an insert portion of a slide gate, said article comprising:
- at least one filler material selected from the group consisting of aluminum oxide, magnesium oxide and titanium diboride;
- and
- a matrix comprising aluminum nitride, said matrix produced by a process selected from the group consisting of sintering, hot pressing and hot isostatic pressing.
Dependencies are inferred from the claim text.