ARC COATING OF REFRACTORY METAL COMPOUNDS

A process for arc coating alloy films on objects using a cathode or target having the two materials from which the alloy is to be formed. An alloy nitride coating may be formed by reacting the flux of coating materials from the cathode with nitrogen. The arc is magnetically steered to move in a clos...

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Bibliographische Detailangaben
Hauptverfasser:	SUBBIAH RAMALINGAM, RONGFENG CHANG
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS 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 ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	A process for arc coating alloy films on objects using a cathode or target having the two materials from which the alloy is to be formed. An alloy nitride coating may be formed by reacting the flux of coating materials from the cathode with nitrogen. The arc is magnetically steered to move in a closed arc track. The track is positioned partially in each material of the cathode to provide a flux having the desired proportion of each material. The length of the closed arc track is defined in relation to the arc speed of travel so that the cathode materials remain molten in the arc track during operation.