SUBSTRATE WITH LOW-PERMEABILITY COATING FOR THE SOLIDIFICATION OF SILICON

The invention relates to a substrate characterised in that it is at least partially surface-coated with a coating containing at least one so-called "barrier" layer comprising silica and one or more material(s) X selected from among SiC, Si, Si3N4, in which layer the amount of X varies betw...

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Bibliographische Detailangaben
Hauptverfasser:	TESTARD, JOHANN, DREVET, BÉATRICE, HUGUET, CHARLES, VOYTOVYCH, RAYISA, EUSTATHOPOULOS, NICOLAS, GARANDET, JEAN-PAUL, CAMEL, DENIS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS THEREOF CONCRETE CORRECTING FLUIDS CRYSTAL GROWTH DYES FILLING PASTES INKS INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL REFRACTORIES SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH SLAG TREATMENT OF NATURAL STONE UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention relates to a substrate characterised in that it is at least partially surface-coated with a coating containing at least one so-called "barrier" layer comprising silica and one or more material(s) X selected from among SiC, Si, Si3N4, in which layer the amount of X varies between 25 -wt.% and 50.-wt.% in relation to the total weight of the barrier layer, said barrier layer being formed by grains of one or more materials X covered at least partially in a silica shell, and said barrier layer being in direct contact with the substrate. La présente invention concerne un substrat caractérisé en ce qu'il est revêtu au moins partiellement en surface, d'un revêtement contenant au moins une couche dite « barrière » comprenant de la silice et un ou plusieurs matériau(x) X choisi(s) parmi SiC, Si, Si3N4, couche dans laquelle la quantité massique de X varie de 25% à 50% par rapport à la masse totale de la couche barrière, ladite couche barrière étant formée de grains d'un ou plusieurs matériaux X recouverts au moins partiellement par une enveloppe de silice, la couche barrière étant disposée en contact direct avec le substrat.