Method of making ceramic articles having channels therein and ar

Details Method of making ceramic articles having channels therein and ar Method of making ceramic articles having channels therein and ar

1992-02-20

1993-03-23

Group, Karl

Stock material or miscellaneous articles

All metal or with adjacent metals

Component of composite having metal continuous phase...

501 97, 501 98, 501127, 501128, 501 88, 501 96, C04B 3565

Patent

active

051962713

ABSTRACT:
A method is provided for producing a self-supporting ceramic body comprising a polycrystalline material comprised of the oxidation reaction product of a parent metal and having therein one or more channels which inversely replicate the geometry of a configured fugative metal. The method includes providing an assembly of the configured fugitive metal and the parent metal, optionally including a bed of permeable filler, and heating the assembly to form a body of molten parent metal. The molten parent metal is oxidized under selected conditions to grow the polycrystalline material to engulf the configured fugitive metal (and to infiltrate the filler, if the filler is present) and to cause the fugitive metal to disperse into the engulfing polycrystalline material thereby leaving behind as the one or more channels the space formerly occupied by the configured fugitive metal. The method provides self-supporting ceramic bodies having therein one or more channels inversely replicating the shape of the configured fugitive metal.

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