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AssigneeLanxide Technology Company, LP
InventorsMarc S. Newkirk, Andrew W. Urquhart, Harry R. Zwicker
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A method of producing self-supporting ceramic bodies having a modified metal-containing component includes first providing a a self-supporting ceramic body comprising (i) a polycrystalline oxidation reaction product formed upon oxidation of a molten parent metal precursor with an oxidant, and (ii) an interconnected metal-containing component at least partially accessible from one or more surfaces of said ceramic body. The surface or surfaces of the ceramic body is contacted with a quantity of foreign metal different from said interconnected metal-containing component at a temperature and for a time sufficient to allow for interdiffusion, whereby at least a portion of said metal-containing component is displaced by said foreign metal. The resulting ceramic body, having an altered metal-containing component, exhibits modified or improved properties.
A self-supporting ceramic body which comprises (a) a polycrystalline oxidation reaction product, and (b) an at least partially three-dimensionally interconnected metal-containing component at least partially open to at least one surface of said ceramic body and at least a portion of which is derived from an extrinsic source by interdiffusion, occurring post-operatively to formation of said polycrystalline oxidation reaction product, between a first metal deposited in situ during formation of said polycrystalline oxidation reaction product and a second metal from said extrinsic source, whereby said ceramic body has at least one property modified from that formed upon said oxidation.
A self-supporting ceramic composite body which comprises (a) a polycrystalline oxidation reaction product of a molten metal precursor and an oxidant, (b) at least one filler, and (c) an at least partially three-dimensionally interconnected metal-containing component at least partially open to at least one surface of said ceramic body and at least a portion of which is derived from an extrinsic source by interdiffusion, occurring post-operatively to formation of said polycrystalline oxidation reaction product, between a first metal deposited in situ during formation of said polycrystalline oxidation reaction product and a second metal from said extrinsic source, whereby said ceramic composite body has at least one property modified from that formed upon said oxidation.
A self-supporting ceramic composite body which comprises (a) alpha-alumina as a polycrystalline oxidation reaction product formed upon oxidation of molten aluminum metal precursor with a vapor-phase oxidant, (b) at least one filler, and (c) about 1-40 volume percent interconnected metal-containing component at least partially open to at least one surface of said ceramic body and at least a portion of which is derived from an extrinsic source by interdiffusion, occurring post-operatively to formation of said polycrystalline oxidation reaction product, between a first metal deposited in situ during formation of said polycrystalline oxidation reaction product and a second metal from said extrinsic source, whereby said ceramic composite body has at least one property modified from that formed upon said oxidation.
Dependencies are inferred from the claim text.