Patent ID: 11933188
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Materials, metallurgy (Chemistry)
Classification: CPC F  B | IPC B  F

Claim 13:
14. A method of manufacturing a shroud segment for a gas turbine engine, the method comprising:
forming a shroud segment with a platform having an outer portion in which a plurality of cooling passages are defined, each of the cooling passages having an open end formed in an end surface of the outer portion of the platform, and an inner portion defining an inner surface of the shroud segment, the inner portion including a shoulder protruding beyond the end surface adjacent the outer portion;
applying a coating material on the inner surface from a source, the coating material being applied while providing an obstruction between the source and the open end with the shoulder to prevent the coating material from reaching the open end of each of the cooling passages; and
after the coating is applied, machining the inner portion to remove at least a part of the shoulder.