METHOD AND APPARATUS FOR CARBON COATING AND BORON-DOPED CARBON COATING

The disclosed invention employs a gravity assisted open system for coating of refractory substrates with a highly uniform layer of graphite or other material. Pyrolytic dissociation of precursor gases in an inert atmosphere flowing downwardly, countercurrent to the upward direction of transport of t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	PHILLIP H DARLING JR
Format:	Patent
Sprache:	eng
Schlagworte:	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 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:	The disclosed invention employs a gravity assisted open system for coating of refractory substrates with a highly uniform layer of graphite or other material. Pyrolytic dissociation of precursor gases in an inert atmosphere flowing downwardly, countercurrent to the upward direction of transport of the substrate material, promotes condensation of the coating material on the moving substrate in a homogenous coating. The open configuration of the system allows continuous feed and takeup of substrate material to reduce startup and shutdown transient conditions affecting uniformity of the coating.