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US 5,023,214 AGranted
Silicon nitride ceramics containing a metal silicide phase
AssigneeHercules Incorporated
InventorsRoger L. K. Matsumoto, Allan B. Rosenthal
Life of this patent
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Abstract
Disclosed is a sintered ceramic product comprising (a) 20-98 percent by weight silicon nitride, (b) 1-80 percent by weight of a silicide of iron, cobalt or nickel and (c) 0.02-20 parts by weight of at least one oxide, nitride, or silicate of an element of IUPAC groups 2, 3, 4, 13 or the lanthanide series. A method for making such a product is also disclosed.
Claims13
A sintered ceramic product consisting essentially of
- (a) from about 20 to about 98 percent silicon nitride,
- (b) from about 1 to about 80 percent of a silicide of at least one metal selected from the group consisting of iron, nickel and cobalt, and
- (c) from 0.02 to about 20 percent of at least one oxide, nitride or silicate of an element selected from IUPAC groups 2, 3, 4, 13 or the lanthanide series, all percentages being by weight based on the total weight of the product.
Dependencies are inferred from the claim text.