CERAMIC COATING POLISHING METHOD

A method of polishing an outer surface (14) of a ceramic coated gas turbine engine component (10) includes applying a rotating diamond brush (20) to the outer surface (14). The brush (20) is configured to achieve a uniform finish of 150 microinches (3.81 microns) RA or less over the surface. The bru...

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Bibliographische Detailangaben
Hauptverfasser:	MILLEA, Christopher J, RIZZO, John P., Jr, PALMIERI, Bartolomeo, TOMEO, Kaitlin M, BARRON, Alan C, THAYER, Henry H
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL DRESSING OR CONDITIONING OF ABRADING SURFACES ENGINE PLANTS IN GENERAL FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING HEATING INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PERFORMING OPERATIONS POLISHING STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A method of polishing an outer surface (14) of a ceramic coated gas turbine engine component (10) includes applying a rotating diamond brush (20) to the outer surface (14). The brush (20) is configured to achieve a uniform finish of 150 microinches (3.81 microns) RA or less over the surface. The brush (20) contains diamond impregnated bristles (22), and is affixed to a rotary head (24) of a robotic arm (26). A force sensing controller (30) limits brush forces against the component (10). The component (10) disclosed is a hot section turbine vane designed for directional control of high temperature, high-pressure combustion gases, but the method may be applied to other components utilized in similar aerospace applications. The polished coating provides an improved thermal barrier for maintaining structural integrity of the component in environments having temperatures ranging up to 2,000 degrees Celsius. The method limits abrasive removal of ceramic material to only 0.0005 to 0.00075 inch (0.00127 to 0.00191 cm), and saves time and expense over past practices.