Damped blade having a single coating of vibration-damping material
First Claim
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1. A turbo-machine blade comprising:
- a metallic substrate defining a metallic surface; and
a singular layer of damping material bonding to said metallic surface and defining an interface therewith, said single layer of damping material extending outwardly of said metallic surface to define an outer surface for said blade, said single layer of damping material extending from said interface to said outer surface substantially homogeneously, said layer being thinnest at a root radius area of the blade.
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Abstract
A vibration damped turbo-machine blade includes a shot peened metallic substrate which provides a shape for the blade. Carried on the metallic substrate and bonded to an outer surface of this substrate is a singular ceramic coating of a damping material. The substrate may be made of forged titanium, and the coating may be made of a ceramic material including cobalt at a weight percentage of from about 13% to about 21%, with the balance of the ceramic material being substantially all tungsten carbide.
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Citations
18 Claims
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1. A turbo-machine blade comprising:
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a metallic substrate defining a metallic surface; and a singular layer of damping material bonding to said metallic surface and defining an interface therewith, said single layer of damping material extending outwardly of said metallic surface to define an outer surface for said blade, said single layer of damping material extending from said interface to said outer surface substantially homogeneously, said layer being thinnest at a root radius area of the blade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of providing a damped blade, said method comprising steps of:
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providing a blade substrate of a metallic material, said blade substrate defining a metallic surface; creating a residual compressive strength in the substrate; and applying and bonding to said metallic surface a singular layer of damping material while using said damping material to define an interface with said metallic material, and extending said single layer of damping material homogeneously outwardly of said metallic surface to define an outer surface for said blade, said layer being thinnest at a root radius area of the blade. - View Dependent Claims (10, 11, 12, 13)
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14. A rotating component of a turbo-machine, the component comprising a central hub;
- and a plurality of blades extending outward from the hub, at least one of the blades including;
a shot peened metallic substrate providing a shape for said blade;
said metallic substrate carrying a singular ceramic vibration damping coating;said singular ceramic vibration damping coating defining two interfaces, one of said two interfaces being defined with said metallic substrate, and the other of said two interfaces being defined by said singular ceramic layer of damping material as an outer surface of said vibration damped blade, said singular ceramic vibration damping coating being substantially homogeneous between said two interfaces and being free of interior sub-layer interfaces, said coating being thinnest at a root radius area of the blades. - View Dependent Claims (15, 16, 17, 18)
- and a plurality of blades extending outward from the hub, at least one of the blades including;
Specification