Composite fastener for ceramic components

F - Mech Eng,Light,Heat,Weapons – 16 – B

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F16B 5/02 (2006.01) E04F 13/08 (2006.01) E04F 13/14 (2006.01) F16B 1/00 (2006.01) F16B 33/02 (2006.01) F16B 35/00 (2006.01)

Patent

CA 2688538

A tubular composite member (1) with two ends (2 A,B) for connecting ceramic components (3) made of a composite comprising an inorganic matrix reinforced with inorganic fibers is provided with an at least partially threaded internal surface (4) and an external surface (6). Further, a ceramic member (3) with at least one surface (8) provided with at least one annular groove (9) comprising an inner shell surface (10), an outer shell surface (11) and a root (12), wherein the inner shell surface (10) is at least partially threaded, is provided. Further, a ceramic member (3) assembly comprising at least two ceramic members (3) being connected by at least one tubular composite member (1), whereas the ends (2 A, B) of said tubular composite member (1) are screwed into either corresponding annular groove (9) of two adjacent ceramic members (3), is provided. The such fastened/ joined ceramic members (3) can be operated at high temperatures (above 1000 °C) especially under thermal cycling and/or thermal shock conditions as well as dynamic mechanical load in different directions. Further, methods to manufacture tubular composite members (1) according to this invention are provided.

La présente invention concerne un élément composite tubulaire (1), doté de deux extrémités (2 A, B) destinées à raccorder les composants céramiques (3) fabriqués à partir d'un composite comprenant une matrice inorganique renforcée par des fibres inorganiques, pourvu d'une surface interne (4) au moins en partie filetée et d'une surface externe (6). En outre, un élément en céramique (3) doté d'au moins une surface (8) est pourvu d'au moins une rainure annulaire (9) comprenant une surface de coque interne (10), une surface de coque externe (11) et un fond (12), la surface de coque interne (10) étant au moins en partie filetée. En outre, un ensemble d'élément en céramique (3) comprend au moins deux éléments en céramique (3) raccordés par au moins un élément composite tubulaire (1), tandis que les extrémités (2A, B) dudit élément composite tubulaire (1) sont vissées à l'intérieur de chaque rainure annulaire (9) correspondante parmi deux éléments en céramique (3) adjacents. Les éléments en céramique (3) ainsi fixés/reliés peuvent fonctionner à des températures élevées (supérieures à 1000°C) en particulier dans des conditions de cyclage thermique et/ou de choc thermique ainsi qu'avec une charge mécanique dynamique dans différentes directions. En outre, la présente invention concerne des procédés de fabrication d'éléments composites tubulaires (1).

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