General Electric Company

General Electric Aviation Service Operation Ptd. Ltd.

General Electric Aviation Service Operation Pte. Ltd.

Ge Aviation Services Operation Ltd.

Kwok Heng Yow

Nigel Brian Thomas Langley

Keng N Chen

Genfa Hu

Nigel Brian Langley

A gas turbine blade to be protected by an aluminide coating is placed within a masking enclosure including an airfoil enclosure that prevents deposition on the airfoil of the gas turbine blade, and a dovetail enclosure that prevents deposition on the dovetail of the gas turbine blade. The assembly is vapor phase aluminided such that aluminum is deposited on an exposed portion of the gas turbine blade that is not within the masking enclosure.

Method for vapor phase aluminiding of a gas turbine blade partially masked with a masking enclosure

A gas turbine blade which has previously been in service is protected by cleaning the gas turbine blade, and then first depositing a platinum first layer on the airfoil and the platform of the gas turbine blade. Thereafter, a platinum second layer is deposited over the platform but not the airfoil. A platinum-aluminide protective coating is formed by depositing an aluminum-containing layer overlying both the platform and the airfoil and interdiffusing the platinum and the aluminum.

Method for selective surface protection of a gas turbine blade which has previously been in service

An improved process for applying aluminide coatings to superalloy components used in gas turbine applications resulting in a more uniform coating with less hazardous waste by-products. The process involves the steps of placing the superalloy components into a retort with an aluminum-containing source, evacuating air from the retort and introducing an inert gas, heating the retort to a preselected temperature, while maintaining the preselected temperature purging the inert gas from the retort by introducing hydrogen gas, while maintaining the preselected temperature, pulsing, by reducing the retort pressure to a preselected pressure below atmospheric pressure, followed by introducing a halide-containing gas to react with the aluminum-containing source to create an aluminum-rich vapor that deposits aluminum on the components, then reintroducing hydrogen gas into the retort to purge the gases within the retort; and cooling the retort.

Pulsed-vapor phase aluminide process for high temperature oxidation-resistant coating applications

Growing community of inventors

Singapore, Singapore

Kwok Heng Yow