Refractory composites of alumina and boron nitride
AssigneeUnion Carbide Corporation
InventorGregory W. Shaffer
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Abstract
Composites of alumina and boron nitride having superior thermal shock resistance, and particularly suitable for use in hot metal applications such as break rings in horizontal continuous casters.
Claims9
A composite produced by heating and compressing a mixture of particulate alumina and boron nitride, which composite consists essentially of between about 50 and about 90 weight percent alumina having a purity of at least 99.90 weight percent, and between about 10 to about 50 weight percent boron nitride having a purity of at least 99 weight percent, said composite having a density not more than about 93% of the theoretical density, and a Rockwell R hardness less than 130.
Dependencies are inferred from the claim text.