Article having a superalloy protective coating, and its fabrication
August 31, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNickel-based single crystal superalloy and method of making Nickel-base superalloy and article with high temperature strength and improved stability Substrate stabilization of diffusion aluminide coated nickel-based superalloys Nickel-base superalloy and article with high temperature strength and improved stability Nickel base superalloy and article Method for preventing recrystallization after cold working a superalloy article Method for making a coated Ni base superalloy article of improved microstructural stability Thermal barrier coating system and method therefor Method for making a coated Ni base superalloy article of improved microstructural stability Preparation of a nickle-based superalloy article containing a reactive element and having a decarburized surface and coating InventorsAssigneeApplicationNo. 09/944707 filed on 08/31/2001US Classes:428/632, Oxide-containing component148/428, Aluminum containing420/445, Aluminum containing427/252, By decomposing metallic compound (e.g., pack process, etc.)427/456, Aluminum, nickel, cobalt, or iron metal or alloy containing coating428/651, Next to refractory (Group IVB, VB, or VIB) metal-base component428/655, Transition metal-base component428/680Ni-base componentExaminersPrimary: Jones, DeborahAssistant: McNeil, Jennifer International ClassesC23C 28/00 (20060101)C23C 28/02 (20060101) AbstractAn article protected by a protective coating includes a substrate made of a first nickel-base superalloy substrate material that is susceptible to the formation of a secondary reaction zone when overlaid by a diffusion aluminide coating or an aluminide overlay coating. A protective coating including a deposited coating at the substrate surface. The deposited coating is a second nickel-base superalloy different from the first nickel-base superalloy and which does not produce a secondary reaction zone when interdiffused with the first nickel-base superalloy. In one version, the deposited coating has a nominal composition, in weight percent, of about 3.1 percent cobalt, about 7.6 percent chromium, about 7.8 percent aluminum, about 5.45 percent tantalum, about 3.85 percent tungsten, about 1.65 percent rhenium, about 0.02 percent carbon, about 0.016 percent hafnium, about 0.015 percent boron, about 0.5 percent silicon, balance nickel and incidental impurities. A ceramic thermal barrier coating may overlie the protective-coating outer surface. | |
