C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/123
C04B 35/65 (2006.01)
Patent
CA 1303336
ABSTRACT OF THE DISCLOSURE A method of producing a self-supporting ceramic com- posite body having therein at least one cavity which in- versely replicates the geometry of a positive mold of parent metal, includes embedding the mold of parent metal within a conformable bed of filler to provide therein a cavity shaped and filled by the mold. The assembly is heated to melt the parent metal mold, e.g., an aluminum parent metal mold, and contacted with an oxidant to oxidize the molten parent metal to form a polycrystalline material which grows through the surrounding of filler, the molten metal being drawn through the growing polycrystalline material to be oxidized at the interface between the oxidant and previously formed oxida- tion reaction product whereby the cavity formerly filled by the mold of parent metal is eventually evacuated by the met- al. There remains behind a cavity whose shape inversely re- plicates the original shape of the mold. m e method pro- vides ceramic composite articles having therein at least one cavity inversely replicating the shape of the mold which supplied the parent metal for oxidation.
528275
Lesher H. Daniel
Newkirk Marc S.
Urquhart Andrew W.
Cassan Maclean
Lanxide Technology Company Lp
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