Self-supporting ceramic articles having shape-replicated surface

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

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Details

428703, 428698, 428689, 501 94, 501127, C04B 3565

Patent

active

052682340

ABSTRACT:
Shaped, self-supporting ceramic bodies are produced by preparing a mold by applying a permeable, conformable material to a shape-defining surface of an expendable pattern. The permeable, conformable material, when set or stable, provides a mold with a shaped surface which is defined by, and is therefore substantially congruent to, the shape-defining surface. Upon heating, the material of the expendable pattern combusts or volatilizes and thus establishes the shaped cavity mold. A molten parent metal is then vaporized with a vapor-phase oxidant in such a manner as to form a ceramic body which grows into the mold cavity, and is shaped by it. The ceramic body is recovered from the mold having a shaped surface replicating the shape-defining surface of the expendable pattern.

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"Oxidation of Molten Aluminum Alloys, Reaction with Refractories"-M. Drouzy and M. Richard-Mar., 1974 Fonderie, France No. 332 pp. 121-128.
"Refractories for Aluminum Alloy Melting Furnaces"-B. Clavaud and V. Jost-Sep., 1980-Lillian Brassinga (from French) Jan., 1985.

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