Aluminide or chromide coating of turbine engine rotor component

A turbine engine rotor component (30), such as a compressor or turbine disk or seal element, is protected from corrosion by depositing an aluminum or chromium coating on the component (30). The deposition can be performed by a vapor deposition process, such as metal organic chemical vapor deposition...

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Bibliographische Detailangaben
Hauptverfasser:	ZIMMERMAN, ROBERT GEORGE JR, ACKERMAN, JOHN FREDERICK, DAS, NRIPENDRA NATH, HEANEY, JOSEPH ALOYSIUS, WEIMER, MICHAEL JAMES, HAZEL, BRIAN THOMAS, NAGARAJ, BANGALORE ASWATHA
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 ENGINE PLANTS IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	A turbine engine rotor component (30), such as a compressor or turbine disk or seal element, is protected from corrosion by depositing an aluminum or chromium coating on the component (30). The deposition can be performed by a vapor deposition process, such as metal organic chemical vapor deposition (MOCVD), to a coating thickness of from about 0.2 to about 50 microns, typically from about 0.5 to about 3 microns. In one embodiment, the method is conducted in a vapor coating container (76) having a hollow interior coating chamber, and includes the steps of loading the coating chamber with the component (30) to be coated; and flowing a tri-alkyl aluminum or chromium carbonyl coating gas (76) into the loaded coating chamber at a specified temperature, pressure, and time to deposit an aluminum or chromium coating on the surface of the component (30). The coated component (30) is then heated (74) in a nonoxidizing atmosphere to a specified temperature to form an aluminide or chromide coating on the surface. The coated component (30) is typically then heated or maintained at an elevated temperature in the presence of oxygen to form an oxide coating on the surface of the component (30).