# US 9,518,325 B2 · Treated coated article and process of treating a coated article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,325 B2 - Document ID: US9518325B2 - Status: Granted - Kind: B2 - Application number: 13/847,253 - Filed: 2013-03-19 - Published: 2014-09-25 - Granted: 2016-12-13 - Earliest claimed: 2013-03-19 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: David Vincent Bucci; Dennis William Cavanaugh - Web page: https://patentgrep.com/patent/US9518325B2 ## CPC - C23C 28/022: {with at least one MCrAlX layer} - C23C 10/26: more than one element being diffused - C23C 28/021: {including at least one metal alloy layer} - C23C 28/028: {Including graded layers in composition or in physical properties, e.g. density, porosity, grain size} - Y10T 428/12535: with additional, spatially distinct nonmetal component - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A process of treating a coated article and a treated article are disclosed. The process includes providing an article having a MCrAlY coating, applying an aluminide treatment onto the MCrAlY coating to form a treated MCrAlY coating, and outwardly forming β-phase material from the MCrAlY coating into the treatment. The applying is selected from the group consisting of soaking, spraying, brushing, dipping, pouring, pack cementation, vapor deposition, and combinations thereof. The treated article includes a substrate and a treated MCrAlY coating positioned on at least a portion of the substrate. The treated MCrAlY coating includes a β-phase aluminide in a spray-applied, brush-applied, pour-applied, dip-applied, pack cement-applied, vapor deposit-applied, or soaking-applied treatment. ## Claims ### Claim 1 A process of treating a coated article, the process comprising: commencing a service period of a gas turbine, the service period being the period throughout which operation of the gas turbine is suspended, the gas turbine including the coated article having a MCrAlY coating; during the service period, applying an aluminide treatment including at least one of NiAl and Ni2Al3 onto the MCrAlY coating to form a treated MCrAlY coating, the aluminide treatment diffusing into the MCrAlY coating by a depth of at least 1 mil, the depth of the MCrAlY into which the aluminide treatment has diffused possessing a strain range of about 4%; and outwardly forming (β-phase material from the MCrAlY coating into the treatment; wherein the applying is selected from the group consisting of soaking, spraying, brushing, dipping, pouring, and combinations thereof, and the process is performed without stripping any MCrAlY from the coated article or re-coating the coated article with MCrAlY during the service period. ### Claim 2 (depends on 1) The process of claim 1, comprising heating the aluminide treatment to a predetermined temperature range of between about 1600° F. and 2200° F. ### Claim 3 (depends on 1) The process of claim 1, comprising heating the aluminide treatment to a predetermined temperature range of between about 1900° F. and 2150° F. ### Claim 4 (depends on 1) The process of claim 1, comprising heating the aluminide treatment to a predetermined temperature range of between about 1950° F. and 2050° F. ### Claim 5 (depends on 1) The process of claim 1, wherein the MCrAlY coating includes a depletion of (β-phase aluminide prior to the applying of the aluminide treatment. ### Claim 6 (depends on 1) The process of claim 1, wherein the aluminide treatment diffuses into the MCrAlY coating by a depth of about 2 mils. ### Claim 7 (depends on 1) The process of claim 1, comprising providing the aluminide treatment with aluminum at a concentration, by weight, of between about 15% and about 30%. ### Claim 8 (depends on 1) The process of claim 1, comprising providing the aluminide treatment with aluminum at a concentration, by weight, of about 20%. ### Claim 9 (depends on 1) The process of claim 1, wherein the aluminide treatment includes NiAl. ### Claim 10 (depends on 1) The process of claim 1, wherein the aluminide treatment includes Ni2Al3. ### Claim 11 (depends on 1) The process of claim 1, wherein the aluminide treatment is a slurry. ### Claim 12 (depends on 1) The process of claim 1, comprising providing an inert atmosphere for the process. ### Claim 13 A process of treating a coated article, the process comprising: commencing a service period of a gas turbine, the service period being the period throughout which operation of the gas turbine is suspended, the gas turbine including the coated article having a MCrAlY coating; during the service period, spraying an aluminide treatment including at least one of NiAl and Ni2Al3 onto the MCrAlY coating to form a treated MCrAlY coating, the aluminide treatment diffusing into the MCrAlY coating by a depth of at least 1 mil, the depth of the MCrAlY into which the aluminide treatment has diffused possessing a strain range of about 4%; and outwardly forming (β-phase material from the MCrAlY coating into the aluminide treatment, wherein the process is performed without stripping any MCrAlY from the coated article or re-coating the coated article with MCrAlY during the service period. ### Claim 14 (depends on 13) The process of claim 13, wherein the (β-phase material includes (β-phase aluminide. ### Claim 15 (depends on 13) The process of claim 13, wherein the MCrAlY coating includes a depletion of (β-phase aluminide prior to the spraying of the aluminide treatment.