MULTILAYER FORMED ARTICLE COATED WITH HEAT-DECOMPOSED BORON NITRIDE AND ITS PRODUCTION

PURPOSE:To obtain a coated multilayer article having excellent heat-resistance, corrosion resistance and chemical stability by forming a graphite layer on a surface of a substrate made of boron nitride, smoothing the obtained multilayer article to a smoothness higher than a specific level and formin...

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Bibliographische Detailangaben
Hauptverfasser:	IWAI RYOJI, KIMURA NOBORU
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS 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 COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIME, MAGNESIA METALLURGY REFRACTORIES SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a coated multilayer article having excellent heat-resistance, corrosion resistance and chemical stability by forming a graphite layer on a surface of a substrate made of boron nitride, smoothing the obtained multilayer article to a smoothness higher than a specific level and forming a heat-decomposed boron nitride coating layer on the smoothed surface. CONSTITUTION:This multilayer formed article coated with a heat-decomposed baron nitride is produced by forming a graphite layer on a surface of a boron nitride substrate by CVD process, smoothing the surface of the obtained multilayer article to a maximum peak height of =0.5mm to lessen the concentration of the internal stress and forming a heat-decomposed boron nitride film on the smoothed surface by a CVD apparatus.