Compositions: ceramic – Ceramic compositions – Refractory
Patent
1992-04-13
1993-08-24
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501102, 501 86, 501 96, 501133, 75232, 75234, 75235, 428446, 428448, 428689, 428699, 428701, 428702, 428566, 428568, 428545, 428632, 428633, 428640, B23K 2800, C03B 3544
Patent
active
052388867
ABSTRACT:
Ceramic bodies are bonded together via a layer of an oxidation reaction product of a molten metal, which metal is present in one or both of the ceramic bodies prior to bonding. At least one of the ceramic bodies comprises a ceramic product formed by the oxidation reaction of molten parent metal (e.g., alumina from molten aluminum) and grown as molten metal is transported through, and oxidized on the surface of, its own oxidation product. One or both of the ceramic bodies used in the bonding process contains surface-accessible channels of residual metal, i.e., metal channels which have resulted from molten-metal transport during the ceramic growth process. When the suitably assembled ceramic bodies are heated in the presence of an oxidant at a temperature above the melting point of the residual metal, molten metal at the surface of at least one of the ceramic bodies reacts with the oxidant to form a layer of oxidation reaction product, which may or may not incorporate at least one filler material. This layer of oxidation reaction product continues to grow between the facing surfaces of the assembled ceramic bodies until the oxidation reaction product forms a bond between the ceramic bodies.
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Luszcz Stanley J.
Newkirk Marc S.
Urquhart Andrew W.
Bell Mark L.
Bonner C. M.
Lanxide Technology Company, LP
Lewis Carol A.
McShane William E.
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