Sprayed skin turbine component
First Claim
1. A process for fabricating a component, comprising:
- forming an array of pits in an outer surface of a core structure;
forming a skin on the outer surface of the core structure, wherein the skin mechanically interlocks with the pits;
diffusion bonding the skin to the outer surface of the core structure; and
forming the pits with an average pit diameter of 20 to 100 microns, an average pit depth of 1.5 to 4 times the average pit diameter, and an average pit separation distance of 1 to 5 times the average pit diameter.
2 Assignments
0 Petitions
Accused Products
Abstract
Fabricating a turbine component (50) by casting a core structure (30), forming an array of pits (24) in an outer surface (32) of the core structure, depositing a transient liquid phase (TLP) material (40) on the outer surface of the core structure, the TLP containing a melting-point depressant, depositing a skin (42) on the outer surface of the core structure over the TLP material, and heating the assembly, thus forming both a diffusion bond and a mechanical interlock between the skin and the core structure. The heating diffuses the melting-point depressant away from the interface. Subsurface cooling channels (35) may be formed by forming grooves (34) in the outer surface of the core structure, filling the grooves with a fugitive filler (36), depositing and bonding the skin (42), then removing the fugitive material.
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Citations
14 Claims
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1. A process for fabricating a component, comprising:
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forming an array of pits in an outer surface of a core structure; forming a skin on the outer surface of the core structure, wherein the skin mechanically interlocks with the pits; diffusion bonding the skin to the outer surface of the core structure; and forming the pits with an average pit diameter of 20 to 100 microns, an average pit depth of 1.5 to 4 times the average pit diameter, and an average pit separation distance of 1 to 5 times the average pit diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for fabricating a turbine component, comprising:
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casting a component core structure; forming grooves in an outer surface of the core structure; filling the grooves with a fugitive filler material; forming pits with an average pit diameter of 20 to 100 microns in the outer surface of the core structure between the grooves; depositing a transient liquid phase (TLP) material comprising a melting-point depressant on the outer surface of the core structure; depositing a skin on the outer surface of the core structure over the TLP material, thereby forming an assembly; heating the assembly, forming a diffusion bond interface between the skin and the core structure and diffusing the melting-point depressant away from the diffusion bond interface; and removing the fugitive filler material, forming subsurface cooling channels under and adjacent to the skin. - View Dependent Claims (13, 14)
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Specification