Ceramic articles with a modified metal-containing component

Stock material or miscellaneous articles – All metal or with adjacent metals – Component of composite having metal continuous phase...

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Details

428565, 428552, 428568, 428628, C22C 2900

Patent

active

051066980

ABSTRACT:
Self-supporting ceramic bodies having a modified metal-containing component are formed by first providing a self-supporting ceramic body comprising (1) 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 are 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.

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patent: 3255027 (1966-06-01), Talsma
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patent: 4743511 (1988-05-01), Sowman et al.
"Oxidation of Molten Aluminum Alloys. Reaction with Refractories"--M. Drouzy and M. Richard--Mar., 1974--Fonderie, France No. 332, pp. 121-128.
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