Channeled ceramic structure and process for making same
AssigneeTht United States of America as represented by the Secretary of the Navy
InventorTodd Jessen
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Abstract
Ceramic structure having porosity of 10-80% is characterized by a solid cmic matrix having therein elongated and parallel channels, the structure is made by a process that includes the steps of: (a) arranging tows of elongated fibers parallel to each other to form a fiber preform, (b) contacting the fiber preform with a matrix precursor whereby the matrix precursor deposits around the fibers, (c) removing the fiber preform from the matrix precursor, (d) drying the fiber preform, (e) calcining the fiber preform, (f) hot pressing the structure containing the fugitive fibers therein, and (g) removing at least some of the fibers to form channels in the structure.
Claims11
A structure devoid of a binder and having use temperature exceeding 1000.degree. C. comprising a ceramic matrix having continuous, spaced parallel channels therein of 1-150 microns in diameter, wherein positioning of said channels can be varied in a controlled fashion and said structure has porosity due to said channels of 30-70%, on volume basis.
Dependencies are inferred from the claim text.