Method of joining ceramic matrix composites and metals
AssigneeThe Boeing Company
InventorsDavid B. Marshall, Min Z Berbon, John R. Porter
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Abstract
A method of joining a ceramic matrix composite rocket nozzle to a metal manifold is provided, wherein a silicon nitride insert is disposed inside the ceramic matrix composite rocket nozzle and the metal manifold to provide a joint therebetween. The silicon nitride insert is preferably co-processed with the ceramic matrix composite rocket nozzle such that the ceramic matrix provides a bond between the rocket nozzle and the insert. The metal manifold is then secured to the silicon nitride insert, preferably using brazing, to form a joint assembly.
Claims19
A joint assembly comprising:
- at least one ceramic matrix composite conduit reinforced with carbon fibers;
- at least one metal conduit;
- and
- a monolithic ceramic insert disposed inside the ceramic composite conduit and the metal conduit;
- wherein the ceramic composite conduit is joined to the metal conduit using the insert.
A joint assembly for use in a rocket nozzle comprising:
- at least one ceramic matrix composite rocket nozzle comprising reinforcing carbon fibers in a ceramic matrix;
- at least one metal manifold;
- and
- a silicon nitride insert disposed inside the ceramic matrix composite rocket nozzle and the metal manifold,
- wherein the ceramic matrix composite rocket nozzle is joined to the metal manifold using the silicon nitride insert.
A process for joining a ceramic matrix composite conduit to a metal conduit comprising the steps of:
- (a) providing the ceramic matrix composite conduit reinforced with carbon fibers;
- (b) securing a monolithic ceramic insert inside at least one fiber preform of the ceramic matrix composite conduit;
- (c) co-processing the monolithic ceramic insert with the fiber preform;
- (d) placing a metal conduit over the monolithic ceramic insert;
- (e) securing the metal conduit to the monolithic ceramic insert;
- and
- wherein, the ceramic matrix composite conduit is joined to the metal conduit using the insert.
A method of joining a ceramic matrix composite rocket nozzle to a metal manifold comprising the steps of:
- (a) providing the ceramic matrix composite rocket nozzle reinforced with carbon fibers;
- (b) securing a silicon nitride insert inside a fiber preform of the ceramic matrix composite rocket nozzle;
- (c) co-processing the silicon nitride insert with the fiber preform;
- (d) placing a metal manifold over the silicon nitride insert;
- and
- (e) brazing the metal manifold to the silicon nitride insert.
Dependencies are inferred from the claim text.