Composite structure having ceramic truss core and method for...

Details Composite structure having ceramic truss core and method for... Composite structure having ceramic truss core and method for...

B - Operations, Transporting

32

B

B32B 18/00 (2006.01) C04B 35/622 (2006.01)

Patent

CA 2635305

A CMC sandwich used to fabricate CMC structures includes facesheets bonded to a core reinforced with a ceramic truss comprising an array of CMC pins. The binder matrix in the ends of the pins is removed, leaving exposed, flexible ceramic fibers. The exposed ceramic fibers are bent so as to extend parallel to the facesheets, and are bonded to one or more plies of the facesheets. The binder matrix in the ends of the ceramic pins may be removed by mechanical or chemical processes.

L'invention porte sur un sandwich de composites à matrices céramiques (CMC) servant à fabriquer des structures en CMC. Il comprend des feuilles de revêtement liées à une contrefiche en céramique munie d'un réseau de tiges en CMC. La matrice liante aux extrémités des tiges est enlevée, ce qui laisse les fibres céramiques souples à découvert. Ces dernières sont courbées de façon à s'étendre parallèlement aux feuilles de revêtement et liées à un ou plusieurs des plis de ces dernières. La matrice liante aux extrémités des tiges peut être enlevée par des procédés mécaniques ou chimiques.

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