Method for forming thick quasi-single phase and single phase platinum nickel aluminide coatings
AssigneeHoneywell International Inc.
InventorsMurali Madhava, George Reimer, Amol Gholkar
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Abstract
A quasi-single phase or single phase thick platinum nickel aluminide coating and methods for forming the coating over a nickel-based superalloy substrate are provided. The method includes the steps of forming a metal layer over a surface of the nickel-based superalloy substrate, the metal layer comprising platinum, growing a diffusion zone comprising a platinum nickel alloy layer from the metal layer and the nickel-based superalloy substrate, and subjecting the platinum nickel alloy to one or more aluminization cycles to transform the platinum nickel alloy into a platinum nickel aluminide coating having a platinum aluminide phase formed therein.
Claims20
A method for forming a thick platinum nickel aluminide coating consisting of single phase or a quasi-single phase platinum nickel aluminide coating over a nickel-based superalloy substrate, the method comprising the steps of:
- forming a metal layer over a surface of the nickel-based superalloy substrate, the metal layer comprising platinum;
- growing a diffusion zone from the metal layer and the nickel-based superalloy substrate, the diffusion zone comprising a platinum nickel alloy;
- and
- subjecting the platinum nickel alloy to at least one aluminization cycle to transform the platinum nickel alloy into a platinum nickel aluminide alloy having a platinum aluminide phase formed therein.
A method for forming a quasi-single phase platinum nickel aluminide coating over a NiCrAlY substrate, the method comprising the steps of:
- forming a metal layer over a surface of the NiCrAlY substrate, the metal layer comprising platinum;
- growing a diffusion zone from the metal layer and the NiCrAlY substrate, the diffusion zone comprising a platinum nickel alloy;
- and
- subjecting the platinum nickel alloy to a plurality of aluminization cycles to transform the platinum nickel alloy into a platinum nickel aluminide alloy having a platinum aluminide phase formed therein, comprising:
- depositing aluminum over the platinum nickel alloy;
- and
- heating the deposited aluminum and the platinum nickel alloy.
A turbine engine component comprising
- a nickel-based superalloy substrate;
- a diffusion zone formed in the substrate;
- an additive layer formed over the diffusion zone, the additive layer comprising a platinum nickel aluminide alloy;
- and
- a platinum aluminide phase formed in the additive layer.
Dependencies are inferred from the claim text.