Method for applying a plasma sprayed coating using liquid injection
AssigneeGeneral Electric Company
InventorsAndrew Skoog, Jane Murphy, Thomas Tomlinson
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Abstract
A method for applying a plasma prayed coating using liquid injection is disclosed. The method includes providing a mixture of a liquid and solid particles. The solid particles are constituents of a thermal barrier coating. The mixture is injected into a plasma jet of a plasma spray device and the plasma jet is directed toward a substrate to deposit a gradient film formed from the constituents onto the substrate.
Claims20
A method for applying a plasma sprayed coating to a material comprising:
- providing a substrate, the substrate having a surface;
- providing a suspension comprising a carrier liquid and solid particles suspended therein, the solid particles including thermal barrier coating constituents;
- injecting the suspension into a plasma jet of a plasma spray device;
- and
- directing the resulting plasma jet toward the substrate surface to deposit a gradient film formed from the constituents onto the substrate surface.
A method for applying a plasma sprayed coating to a material comprising:
- providing a substrate, the substrate having a substrate surface;
- providing a liquid/solid mixture comprising a carrier liquid and solid particles intermixed therewith, the solid particles including thermal barrier coating constituents;
- providing particulate thermal barrier coating constituents other than in a liquid/solid mixture;
- separately injecting the liquid/solid mixture and the particulate thermal barrier coating constituents into a plasma jet of a plasma spray device;
- and
- directing the resulting plasma jet toward the substrate surface to deposit a gradient film formed from the constituents onto the substrate surface.
A device for applying a thermal barrier coating system to a substrate comprising:
- a plasma gun having a passage for the flow of a plasma-forming gas therethrough and an electrode disposed in the passage, the electrode configured to create an electric arc sufficient to heat the plasma-forming gas to a temperature that causes a change of state in the plasma-forming gas to create a plasma jet upon exiting the plasma gun;
- a liquid injector configured to inject a suspension of a carrier liquid and solid particles comprising thermal barrier coating constituents into a plasma jet exiting the plasma gun;
- and
- a powder injector configured to inject particulate thermal barrier coating constituents entrained in an inert gas into the plasma jet exiting the plasma gun.
Dependencies are inferred from the claim text.