Heat treatable coated article with dual layer overcoat

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 17/36 (2006.01)

Patent

CA 2530303

A coated article is provided so as to include an overcoat having, an outermost layer including silicon nitride which overlies an underlayer including a metal oxide (MOx) or a metal oxynitride (MOxNy), where the metal (M) is selected from the group of Cr, Nb, Hf, Ta, and/or combinations thereof. Such an overcoat provides for good mechanical and chemical protection in the context of heat treatable coated articles. Coated articles herein may be used in the context of insulating glass (IG) window units, architectural or residential monolithic window units. vehicle windows, and/or the like.

L'invention concerne un article présentant un revêtement. Cet article comprend une couche de finition présentant une couche extérieure comprenant du nitrure de silicium déposé sur une sous-couche comprenant un oxyde métallique (MO¿x?) ou un oxynitrure métallique (MO¿x?N¿y?), le métal (M) étant sélectionné dans le groupe : Cr, Nb, Hf, Ta, et/ou des combinaisons de ceux-ci. Une telle couche de finition permet d'obtenir une bonne protection mécanique et chimique pour des articles présentant un revêtement, aptes à un traitement thermique. Les articles présentant un revêtement de l'invention peuvent être utilisés dans le domaine des unités de fenêtre en verre isolant (IG), des unités de fenêtre monoblocs architecturales ou résidentielles, des vitres de véhicule et/ou analogues.

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