Liquid jet removal of plasma sprayed and sintered
AssigneeUnited Technologies Corporation
InventorsCharles C. McComas, John W. Appleby, Jr., Gerard A. Sileo, Herbert R. Barringer, Michael J. Patry
Life of this patent
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Abstract
Gas turbine engine coatings must often be removed during engine maintenance and repair. The techniques utilized to accomplish this task, machining, chemical stripping, machining followed by chemical stripping, or grit blasting, frequently result in component damage or destruction. Liquid jet erosion can be utilized to remove seals, coatings, or portions thereof without damaging the engine hardware.
Claims13
A method for removing a top coat from a bond coating adhered to a substrate, utilizing a liquid jet, said liquid jet having means for directing the liquid jet, means for creating sufficient pressure to remove the coating, means to provide the relative motion between the coating and the liquid jet, and means for supplying the liquid, which comprises:
- a. creating sufficient pressure to remove the coating;
- b. providing relative motion between the coating and the liquid jet;
- c. supplying the liquid;
- d. causing the liquid to strike the top coat, wherein the liquid striking the top coat causes top coat erosion until the bond coat is exposed;
- whereby the bond coat and the substrate suffer essentially no damage and can be reused.
Dependencies are inferred from the claim text.