US Patent No. 9,683,443

METHOD FOR MAKING GAS TURBINE ENGINE CERAMIC MATRIX COMPOSITE AIRFOIL


Patent No. 9,683,443
Issue Date June 20, 2017
Title Method For Making Gas Turbine Engine Ceramic Matrix Composite Airfoil
Inventorship Ted J. Freeman, Danville, IN (US)
Richard C. Uskert, Timonium, MD (US)
Assignee Rolls-Royce North American Technologies, Inc., Indianapolis, IN (US)

Claim of US Patent No. 9,683,443

11. A method comprising:
fabricating an airfoil preform as a cooling passage preform having a spanwise extending trailing end portion and a plurality
of flow dividing members projecting from the spanwise extending trailing end portion towards a forward end and defining cooling
passages therebetween;

coupling a cooling delivery core to the forward end of the cooling passage preform to close a forward end of the cooling passages;
covering the cooling passages with a ceramic matrix material; and
trimming the spanwise extending trailing end portion of the cooling passage preform to expose the cooling passages.