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AssigneeGeneral Electric Company
InventorsRamgopal Darolia, Joseph David Rigney, William Scott Walston, Jeffrey Allan Pfaendtner, Brett Allen Rohrer Boutwell, Irene Spitsberg, James Anthony Ruud
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A beta-phase NiAl overlay coating containing a dispersion of ceramic particles and a process for depositing the overlay coating. If the coating is used to adhere a thermal barrier coating (TBC), the TBC exhibits improved spallation resistance as a result of the dispersion of ceramic particles having a dispersion-strengthening effect on the overlay coating. The overlay coating contains at least one reactive element and is deposited so that the some of the reactive element deposits as the ceramic particles dispersed in the overlay coating.
A coating system on a superalloy substrate, the coating system comprising a beta-phase NiAl intermetallic overlay coating containing zirconium in solid solution and a dispersion of ceramic particles selected from the group consisting of oxides, nitrides, and carbides of zirconium, the ceramic particles being present in an amount and size sufficient to be stable and unreactive at temperatures up to about 1300° C. and to increase the strength of the overlay coating by a dispersion strengthening mechanism.
A coating system on a nickel-base superalloy substrate of a gas turbine engine component, the coating system comprising a ceramic layer on a beta-phase NiAlCr intermetallic overlay bond coal, the overlay bond coat consisting of nickel, aluminum, chromium, zirconium, and a dispersion of ceramic particles formed of at least one compound selected from the group consisting of oxides, nitrides, and carbides of chromium and zirconium, the ceramic particles being present in the overlay bond coat in an amount and size sufficient to be stable and unreactive at temperatures up to about 1300° C. and to increase the strength of the overlay bond coat by a dispersion strengthening mechanism.
Dependencies are inferred from the claim text.