Protecting components during aluminizing or chromizing

A component formed from an iron, cobalt or nickel-base alloy has a protective arrangement to prevent aluminizing or chomizing during gas diffusion coating, with a first layer as an interlayer and a second layer as a getter layer for reaction gases. The first layer is a slip casting layer composed of...

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Bibliographische Detailangaben
Hauptverfasser:	HEINRICH WALTER, RALPH KROPP, MICHAEL STRASSER, FRANK BRUNGS, MARTIN SCHAIPP, HORST PILLHOEFER
Format:	Patent
Sprache:	eng
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 component formed from an iron, cobalt or nickel-base alloy has a protective arrangement to prevent aluminizing or chomizing during gas diffusion coating, with a first layer as an interlayer and a second layer as a getter layer for reaction gases. The first layer is a slip casting layer composed of oxide ceramic particles carried in a low-carbon vehicle free from halide, and the second layer is a metal layer or a metallic slip casting layer. the metal layer contains at least 50% by weight of the basemetal fraction of the component and exhibits all major alloy constituents of the component. The metal layer may be a sintered metal shape. The second layer may be deposited by plasma spraying, electroplating, painting, vapour deposition or foil plating. A coating is formed on a jet engine turbine blade using Al2O3 in aqueous PVA, followed by nickel alloy powder in aqueous PVA.