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US 12,668,866 B2Granted
Airfoil external masking for internal aluminization
AssigneeRtx Corporation
InventorsAlex C. Freedman, Daniel M. Franklin
Life of this patent
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Abstract
A masking apparatus for masking a part during coating and comprising at least two sintered pieces of a mask material. The pieces have an assembled condition forming a compartment shaped to accommodate an airfoil of the part. The pieces have an average overall composition of: nickel as a largest by-weight constituent; aluminum as a second largest by-weight constituent; and chromium as a third largest by-weight constituent.
Claims11
A method for manufacturing a cooled part, the method comprising:
- applying a pre-formed mask to a cast substrate having an exterior surface and an interior surface;
- aluminizing the interior surface;
- removing the pre-formed mask;
- and
- applying a metallic coating to the exterior surface,
- wherein:
- the mask comprises a sintered body of a mask material;
- the mask material comprises nickel and aluminum;
- the method further comprises forming the pre-formed mask by compacting and sintering one or more powders;
- and
- the compacting and sintering one or more powders comprises compacting with a polymeric binder, the sintering leaving porosity from vaporization or decomposition of the binder.
8 more elements
Dependencies are inferred from the claim text.