Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Patent
1988-06-23
1989-08-01
Dixon Jr., William R.
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
501 96, 501 98, 501120, 501127, 501128, 423345, 423412, 423625, 264 65, 264DIG36, C04B 3510, C04B 3556, C04B 3558
Patent
active
048533521
ABSTRACT:
A method to produce an article of commerce comprising a self-supporting ceramic body by oxidation of a molten parent metal with a vapor-phase oxidant, includes applying to a surface of the parent metal a layer at least one dopant material therein. The layer is thin relative to the thickness of the ceramic body. Upon heating the parent metal to a molten state in the presence of the oxidant, e.g., air, an oxidation reaction product is formed on the molten metal which, because of the effect of the dopant material, migrates through the growing oxidation reaction product so as to be exposed to the oxidant to form additional oxidation reaction product to and beyond the depth of the applied dopant material layer. Suitable temperature and oxidizing conditions are maintained for a time sufficient to produce a self-supporting ceramic body.
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Newkirk Marc S.
Zwicker Harry R.
Dixon Jr. William R.
Group Karl
Lanxide Technology Company, LP
McShane William E.
Mortenson Mark G.
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