Attachment of structures having different physical characteristics
AssigneeRaytheon Technologies Corporation
InventorsGrant O. Cook, III, James T. Roach
Life of this patent
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Abstract
A rotor assembly for a gas turbine engine is disclosed. The assembly includes: a composite fan blade, the fan blade including a root; a metallic rotor including a slot for receiving the root; the root being at least partially coated with a metal to form a metal-coated portion; the metal-coated portion of the root being at least partially covered with an intermediate material; and the root, metal-coated portion and intermediate material being received in the slot and bonded to the rotor.
Claims8
A rotor assembly for a gas turbine engine, the assembly comprising:
- a composite fan blade, the fan blade including a root;
- a metallic rotor including a slot for receiving the root;
- the root being at least partially coated with a metal to form a metal-coated portion;
- the metal-coated portion of the root being at least partially covered with an intermediate material;
- and
- the root, metal-coated portion and intermediate material being received in the slot and bonded to the rotor.
A method of bonding a first structure to a second structure, the method comprising:
- providing the first structure having a first coefficient of thermal expansion (CTE);
- providing the second structure having a second CTE, the first and second CTEs being different;
- selecting an intermediate material having a third CTE that falls between the first and second CTEs;
- coating a portion of the first structure to provide a metal-coated portion;
- applying the intermediate material to the metal-coated portion of the first structure;
- and bonding the first structure to the intermediate material and the intermediate material to the second structure by liquid phase bonding.
Dependencies are inferred from the claim text.