Methods of forming high strength coatings
AssigneeHoneywell International Inc.
InventorsDerek Raybould, Murali N. Madhava
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Abstract
The present invention thus provides an improved method for coating turbine engine components. The method utilizes a cold high velocity gas spray technique to coat turbine blades, compressor blades, impellers, blisks, and other turbine engine components. These methods can be used to coat a variety of surfaces thereon, thus improving the overall durability, reliability and performance of the turbine engine itself. The method includes the deposition of powders of alloys of nickel and aluminum wherein the powders are formed so as to have an amorphous microstructure. Layers of the alloys may be deposited and built up by cold high velocity gas spraying. The coated items displayed improved characteristics such as hardness, strength, and corrosion resistance.
Claims17
A method of forming an article on a substrate surface comprising the steps of:
- providing a powder of a material that comprises an alloy having an amorphous microstructure and has a particle size of between about 1 to about 50 microns;
- accelerating the powder of the material in a carrier gas by a cold gas spraying process to a particle velocity of at least 300 m/s to form a deposited layer of the powder material on the substrate surface;
- and
- heat treating the deposited layer to devitrify the amorphous microstructure to form a microcrystalline nano-microstructure coating.
A method of forming an article on a substrate surface comprising the steps of:
- providing a powder of a material that comprises an alloy having an amorphous microstructure and has a particle size of between about 1 to about 50 microns;
- accelerating the powder of the material in a carrier gas by a cold gas spraying process to a particle velocity of at least 300 m/s to form a deposited layer of the powder material on the substrate surface;
- and
- heat treating the deposited layer to devitrify the amorphous microstructure to form a coating consisting of a microcrystalline nano-microstructure.
Dependencies are inferred from the claim text.