Rolls-Royce North American Technologies Inc.

Rolls-Royce Corporation

Mark Steven McCormick

Matthew T Kush

Randolph Clifford Helmink

Michel Shawn Smallwood

Tab Michael Heffernan

One embodiment of the present is may include a gas turbine engine having an electrical machine for generating electrical power. Other embodiments may include other gas turbine engines having electrical machines for generating electrical power. Still other embodiments may include apparatuses, systems, devices, hardware, methods, and combinations for gas turbine engines having electrical machines for generating electrical power.

Gas turbine engine

A method includes removing a casting shell and core from a cast component, which may be a gas turbine blade. The method further includes utilizing a focused removal technique, such as a water jet or laser drill, to remove a portion of a virtual pattern cast (VPC) shell from the cast component. The cast component is then exposed to a leaching solution and high pressure water wash to remove an internal core material and a portion of the VPC shell remainder from the cast component. The method further includes exposing the cast component to a high agitation leaching solution and to the high pressure water wash for a minimal time. An electroless nickel-boron coating is then applied to the cast component, and an electrolytic palladium coating is further applied to the cast component. The cast component is further exposed to a high agitation leaching solution for an extended period.

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Martinsville, IN, United States of America

Mark Steven McCormick