Wear-resistant coating and a component having a...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 30/00 (2006.01) B32B 15/00 (2006.01) B32B 18/00 (2006.01)

Patent

CA 2537205

The invention relates to a wear-resistant layer, in particular an erosion resistant layer, for a fludically stressed component. According to the invention, the wear-resistant layer comprises one or several multi-layer systems (15, 16) which are repeatedly applied to the surface which is to be coated. Each of the applied multi-layered systems (15, 16) comprises at least four different layers. A first layer (17), which is oriented towards the surface which is to be coated, of each multi-layered system is made of a metal material adapted to the composition of the surface of the component which is to be coated. A second layer (18), which is applied to the first layer of each multi-layered system, is made of a metal alloy material adapted to the composition of the surface of the component which is to be coated. A third layer (19), which is applied to the second layer of each multi-layered system, is made of graduated metal ceramic material and a fourth layer (20), which is applied to the third layer of each multi-layered system, is made of a nanostructured ceramic material.

L'invention concerne un revêtement de protection contre l'usure, notamment un revêtement de protection contre l'érosion, destiné à une pièce exposée à des contraintes de mécanique des fluides. Selon l'invention, ce revêtement de protection contre l'usure présente un ou plusieurs systèmes multicouches (15, 16) appliqués de manière répétée sur la surface à revêtir, chaque système appliqué (15, 16) comprenant au moins quatre couches différentes. Une première couche (17), orientée vers la surface à revêtir, de chaque système multicouche est constituée d'un matériau métallique adapté à la composition de la surface de la pièce à revêtir. Une deuxième couche (18), appliquée sur la première couche, de chaque système multicouche est constituée d'un matériau d'alliage métallique adapté à la composition de la surface de la pièce à revêtir. Une troisième couche (19), appliquée sur la deuxième couche, de chaque système multicouche est constituée d'un matériau métallique-céramique à gradient et une quatrième couche (20), appliquée sur la troisième couche, de chaque système multicouche est constituée d'un matériau céramique nanostructuré.

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