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US 12,753,481 B2Granted
Method to produce porous segmented thermal barrier coating and a porous segmented thermal barrier coating
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsRoy Patgunarajah, Dimitrios Zois
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Abstract
A method to produce a segmented thermal barrier coating by spraying a partially stabilized Zirconia powder with grain sizes such as −125 μm+45 μm. A coating system includes a substrate, especially a nickel or cobalt based substrate, a bond coat on the substrate, especially a metallic bond coat, and a segmented thermal barrier coating produced by the method.
Claims12
A coating system, which comprises
- a substrate,
- a bond coat on the substrate,
- a segmented thermal barrier coating,
- wherein a lower layer is a thermal barrier coating and an upper ceramic layer is a segmented thermal barrier coating produced by fully stabilized Zirconia,
- wherein the fully stabilized Zirconia used for the upper ceramic layer is a 48% Yttria stabilized Zirconia,
- wherein the substrate comprises a nickel or cobalt based substrate,
- wherein the segmented thermal barrier coating comprises a surface roughness of 8 μm-10 μm,
- wherein the segmented thermal barrier coating has a porosity higher than 8%, and a maximum of 20%, and
- wherein the segmented thermal barrier coating comprises vertical cracks that travel transversely through the segmented thermal barrier coating and that do not branch.
6 more elements
A coating system, which comprises
- a substrate;
- a bond coat on the substrate;
- a segmented thermal barrier coating;
- wherein a lower layer is a thermal barrier coating and an upper ceramic layer is a segmented thermal barrier coating produced by fully stabilized Zirconia;
- wherein the fully stabilized Zirconia used for the upper ceramic layer is a 48% Yttria stabilized Zirconia;
- wherein the substrate comprises a nickel or cobalt based substrate;
- wherein the segmented thermal barrier coating has a porosity higher than 8%, and a maximum of 20%;
- and
- wherein the segmented thermal barrier coating comprises vertical cracks that travel transversely through the segmented thermal barrier coating and that do not branch.
6 more elements
Dependencies are inferred from the claim text.