Bilayer thermal barrier coatings with an advanced interface
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsChristopher Degel, Roy Patgunarajah, Dimitrios Zois
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Abstract
A component with a ceramic coating system wherein the component includes a substrate, especially a nickel- or cobalt-based superalloy, a metallic bond coat, especially based on a NiCoCrAl composition, a ceramic coating system with an lower ceramic coating and an upper ceramic coating. An intermediate coating is located between lower coating and upper coating, providing a rougher surface which has a maximum thickness of 25% of the thickness of the lower coating or of the upper coating. The bonding capacity of a ceramic coating system is improved by adapting the coating parameters such as size of the powder and changing of the parameters of the spraying system.
Claims19
A component, comprising:
- a substrate comprising a nickel- or cobalt-based superalloy;
- a metallic bond coat;
- and
- a ceramic coating system comprising:
- a lower ceramic coating and an upper ceramic coating,
- an intermediate ceramic coating located between the lower ceramic coating and the upper ceramic coating, comprising a rougher surface than an upper surface of the lower ceramic coating, and comprising a maximum thickness of 25% of a thickness of the lower ceramic coating or of the upper ceramic coating, and
- wherein the intermediate ceramic coating comprises a porosity greater than a porosity of the lower ceramic coating.
A component, comprising:
- a substrate;
- a metallic bond coat based on a NiCoCrAl composition;
- and
- a ceramic coating system comprising:
- a lower ceramic coating and an upper ceramic coating,
- an intermediate ceramic coating located between the lower ceramic coating and the upper ceramic coating, comprising a rougher surface than an upper surface of the lower ceramic coating, and comprising a maximum thickness of 25% of a thickness of the lower ceramic coating or of the upper ceramic coating, and
- wherein the intermediate ceramic coating comprises a porosity greater than a porosity of the lower ceramic coating.
Dependencies are inferred from the claim text.