Assembly for making ceramic composite structures and method of u

Details Assembly for making ceramic composite structures and method of u Assembly for making ceramic composite structures and method of u

1987-01-14

1989-05-23

Dixon, Jr., William R.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

264 65, 501 94, 156 89, B01J 800

Patent

active

048328928

ABSTRACT:
An assembly for the preparation of ceramic composite structures includes a segmented container within which a permeable filler is retained and a parent metal body is contacted with the bed of permeable filler. The segmented container is comprised of one or more segments made of a material, such as an INCONEL alloy, which has a coefficient of thermal expansion which is significantly greater than that of the filler. The segments are arranged to define between or among them one or more expansion joints which are effective to accommodate circumferential thermal expansion of the segments to thereby inhibit or prevent volumetric expansion of the container. A method of forming ceramic composite structures includes heating the resulting assembly in the presence of an oxidant to melt and oxidize the parent metal, e.g., aluminum, to form a polycrystalline material comprising an oxidation reaction product which grows through the mass of filler to embed it and thus form the composite structure.

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