Machine components and methods of fabricating
AssigneeGeneral Electric Company
InventorsGanjiang Feng, Paul S. Dimascio, Jon C. Schaeffer
Life of this patent
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Abstract
A thermal barrier coating (TBC) system is provided. The system includes at least one thermal barrier coating (TBC) bond coat layer formed over a substrate surface region. The TBC bond coat layer includes at least one TBC bond coat material. The TBC bond coat material is a nickel-chromium-aluminum-yttrium (NiCrAlY) composition that also includes silicon (Si), hafnium (Hf) and less than 10 weight percent (wt %) cobalt (Co). The TBC system further includes at least one top coat layer formed over the TBC bond coat layer.
Claims17
A method of fabricating a machine component comprising:
- providing a machine component having a substrate including a surface region;
- forming a thermal barrier coating (TBC) system over the component comprising forming at least one TBC bond coat layer over the substrate surface region, wherein the at least one TBC bond coat layer is a nickel-chromium-aluminum-yttrium (NiCrAlY) composition having silicon (Si), hafnium (Hf) and less than 10 weight percent (wt %) cobalt (Co), wherein the at least one TBC bond coat layer comprises at least one oxygen active element selected from the group consisting of iridium, osmium, palladium, platinum, rhodium, and ruthenium;
- and
- distributing Si substantially uniformly within the at least one TBC bond coat layer such that:
- localized weight percents of Si do not exceed a predetermined weight percent of approximately 4.0%;
- and
- formation of SiO2 is facilitated to be reduced.
A thermal barrier coating (TBC) system comprising:
- at least one thermal barrier coating (TBC) bond coat layer formed on a substrate surface region, said layer comprising at least one TBC bond coat material, said material being a nickel-chromium-aluminum-yttrium (NiCrAlY) composition, said NiCrAlY composition comprising silicon (Si), hafnium (Hf) and less than 10 weight percent (wt %) cobalt (Co), wherein the at least one TBC bond coat layer comprises at least one oxygen active element selected from the group consisting of iridium, osmium, palladium, platinum, rhodium, and ruthenium;
- at least one top coat layer formed over said TBC bond coat layer;
- and
- a predetermined weight percent of Si substantially uniformly distributed within said at least one TBC bond coat layer such that localized weight percents of Si do not exceed a predetermined weight percent of approximately 4.0% and formation of SiO2 is facilitated to be reduced.
A machine component comprising:
- a substrate, said substrate comprising a surface region, at least a portion of said substrate surface region comprising a predetermined material composition;
- a thermal barrier coating (TBC) system comprising at least one thermal barrier coating (TBC) bond coat layer formed over said substrate surface region and at least one top coat layer formed over said TBC layer, said TBC bond coat layer comprising at least one TBC bond coat material, said material being a nickel-chromium-aluminum-yttrium (NiCrAlY) composition, said composition comprising silicon (Si), hafnium (Hf) and less than 10 weight percent (wt %) cobalt (Co), wherein the at least one TBC bond coat layer comprises at least one oxygen active element selected from the group consisting of iridium, osmium, palladium, platinum, rhodium, and ruthenium;
- and
- a predetermined weight percent of Si substantially uniformly distributed within said at least one TBC bond coat layer such that localized weight percents of Si do not exceed a predetermined weight percent of approximately 4.0% and formation of SiO2 is facilitated to be reduced.
Dependencies are inferred from the claim text.