Coating system and method for maintenance thereof
AssigneeROLLS-ROYCE plc
InventorThomas M. Mulcahy
Life of this patent
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Abstract
A coating system includes a bond layer including CoNiCrAlY; a thermal barrier layer at least partially disposed on the bond layer and including yttria stabilised zirconia; a mesh layer connecting the thermal barrier layer to the bond layer and including CoNiCrAlY; and an abradable layer disposed on the thermal barrier layer and including magnesium spinel. The mesh layer includes a plurality of cells connected to each other and is at least partially embedded in the thermal barrier layer. Each cell defines a cell opening therethrough and the cell opening of each of the plurality of cells at least partially receives the thermal barrier layer therein. The abradable layer and the thermal barrier layer are at least partially removable from the mesh layer and the bond layer without damaging them.
Claims15
A coating system for an article, the coating system comprising:
- a bond layer disposed on the article and comprising CoNiCrAlY;
- a thermal barrier layer at least partially disposed on the bond layer, the thermal barrier layer comprising yttria stabilised zirconia;
- a wire mesh layer connecting the thermal barrier layer to the bond layer, the wire mesh layer comprising CoNiCrAlY, wherein the wire mesh layer comprises a plurality of cells connected to each other, wherein the wire mesh layer extends from the bond layer and is at least partially embedded in the thermal barrier layer, wherein each cell of the plurality of cells defines a cell opening therethrough, and wherein the cell opening of each cell of the plurality of cells at least partially receives the thermal barrier layer therein, wherein each cell of the plurality of cells comprises a cell wall, the cell wall comprising:
- a first portion that is at least partially embedded within the bond layer, the first portion having a first maximum width;
- and
- a second portion that extends from the first portion opposite to the bond layer and is at least partially embedded in the thermal barrier layer, the second portion having a second maximum width, wherein the second maximum width is greater than the first maximum width;
- and
- an abradable layer disposed on the thermal barrier layer and comprising magnesium spinel;
- wherein the abradable layer and the thermal barrier layer are at least partially removable from the wire mesh layer and the bond layer without damaging the wire mesh layer and the bond layer.
Dependencies are inferred from the claim text.