Wear-resistant coating

Details Wear-resistant coating Wear-resistant coating

C - Chemistry, Metallurgy

23

C

C23C 28/00 (2006.01) C23C 14/08 (2006.01)

Patent

CA 2636608

The invention relates to a wear-resistant coating, especially for gas turbine components, comprising a horizontally segmented or multilayered structure, i.e. at least one relatively hard, ceramic layer (24, 25, 26, 27; 36, 37, 38, 39) and at least one relatively soft, metallic layer (28, 29, 30, 31; 40, 41, 42, 43). The or each ceramic layer and the or each metallic layer are alternately arranged on top of each other in such a way that an external layer (27; 39) forming an external surface of the wear-resistant coating is embodied as a ceramic layer. According to the invention, at least the external, ceramic layer (27; 39) is segmented in a column-type manner in a vertical direction.

L'invention concerne un revêtement anti-usure, en particulier pour composants de turbine à gaz, comprenant une structure horizontale segmentée ou multicouche, à savoir, au moins une couche céramique relativement dure (24, 25, 26, 27; 36, 37, 38, 39) et au moins une couche métallique relativement molle (28, 29, 30, 31; 40, 41, 42, 43), la/ ou chacune des couches céramiques, ainsi que la/ ou chacune des couches métalliques étant disposées alternativement les unes au-dessus des autres, de façon qu'une couche extérieure (27, 39) qui forme la surface extérieure du revêtement anti-usure, soit constituée par une couche céramique. L'invention est caractérisée en ce qu'au moins la couche céramique extérieure (27; 39) est segmentée de manière à former des colonnes.

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