Structure and method of fabricating a metal composite drive...

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

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64/1

F16C 3/02 (2006.01)

Patent

CA 1146372

-6- ABSTRACT OF THE DISCLOSURE A high specific modulus shaft for a gas turbine engine is constructed having a metal outer tube to trans- mit the torque and a metal and high modulus filament com- posite sleeve bonded to the tube's inner diameter. The composite sleeve is fabricated and bonded to the inner diameter of the tube by winding the composite composition tape on a mandrel with the filaments axially aligned. The mandrel is then inserted into a metal outer tube. The as- sembly is encapsulated, evacuated and sealed and the man- drel pressurized at a sufficient temperature to achieve consolidation and diffusion bonding of the wound composite to itself and the shaft inner diameter.

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