Method of making shaped ceramic articles by shape replication of

Details Method of making shaped ceramic articles by shape replication of Method of making shaped ceramic articles by shape replication of

1988-06-13

1989-05-16

Cintins, Ivars

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 60, 264 82, C04B 3332, C04B 3560

Patent

active

048307998

ABSTRACT:
A method of producing shaped, self-supporting ceramic bodies includes 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 oxidized 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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"Refractories for Aluminum Alloy Melting Furnaces" by B. Clavaud and V. Jost, Sep. 1980--Trans. Lillian Brassinga, Jan. 1985.

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