Abstract: Ceramic structure having therein reinforcing fibers and backfilled strands s prepared by the arranging tows of fugitive and reinforcing fibers parallel to each other to form a fiber preform, contacting the preform with a matrix precursor whereby the precursor deposits around the fibers, removing the preform from the precursor wherein the fibers are coated with the precursor, drying the preform to solidify the precursor on the fibers and to convert the precursor to a matrix form, calcining the preform to convert the matrix form on the fibers to another matrix form, removing the fugitive fibers from the preform to form channels therein, backfilling the channels with a material, and hot pressing the preform for densification purposes to form the ceramic structure containing spaced fibers and spaced backfilled material strands disposed in the matrix.

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.

Abstract: Ceramic structure and process for its preparation wherein the structure is omposed of a matrix having therein parallel and spaced reinforcing fibers and strands of backfilled ceramic material, the strands being parallel to the reinforcing fibers; and wherein the process includes the steps of arranging tows of fugitive and reinforcing fibers parallel to each other to form a fiber preform, contacting the preform with a matrix precursor whereby the precursor deposits around the fibers, removing the preform from the precursor wherein the fibers are coated with the precursor, drying the preform to solidify the precursor on the fibers and to convert the precursor to a matrix form, calcining the preform to convert the matrix form on the fibers to another matrix form, removing the fugitive fibers from the preform to form channels therein, backfilling the channels with a material, and hot pressing the preform for densification purposes to form the ceramic structure containing spaced fibers and spaced backfilled materi

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.