# US 2014/0193664 A1 · Recoating process and recoated turbine blade > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193664 A1 - Document ID: US20140193664A1 - Status: Published application - Kind: A1 - Application number: 13/735,342 - Filed: 2013-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Christopher Edward THOMPSON; John D. WARD, JR.; Mark Lawrence HUNT; Jonathan Matthew LOMAS; Gareth William David LEWIS; Michael Anthony DEPALMA, III - Web page: https://patentgrep.com/patent/US20140193664A1 ## CPC - F01D 5/288: {Protective coatings for blades} - F01D 5/005: {Repairing methods or devices} - F05D 2230/31: Layer deposition - Y10T 428/12618: Plural oxides - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Recoating process and recoated turbine blade are disclosed. The recoating process includes providing a coated turbine blade, then removing a portion of the thermal barrier coating system to form a partially-stripped turbine blade, then applying a bond recoat to the stripped region of the partially-stripped turbine blade; and then applying a thermal barrier recoat to the bond recoat to form a recoated turbine blade. The recoated turbine blade comprises the bond coating portion abutting the bond recoat, the thermal barrier coating portion abutting the thermal barrier recoat, and the stepped configuration. The coated turbine blade has a thermal barrier coating system positioned on a substrate. The partially-stripped turbine blade has a stripped region, a bond coating portion, a thermal barrier coating portion, and a stepped configuration. ## Claims ### Claim 1 A recoating process, comprising: providing a coated turbine blade, the coated turbine blade having a thermal barrier coating system positioned on a substrate; then removing a portion of the thermal barrier coating system to form a partially-stripped turbine blade having a stripped region; then applying a bond recoat to the stripped region of the partially-stripped turbine blade; and then applying a thermal barrier recoat to the bond recoat to form a recoated turbine blade. ### Claim 2 (depends on 1) The recoating process of claim 1, wherein the thermal barrier coating system includes a thermal barrier coating and a bond coat. ### Claim 3 (depends on 1) The recoating process of claim 1, wherein the removing is by water-jet stripping. ### Claim 4 (depends on 1) The recoating process of claim 1, wherein the partially-stripped turbine blade comprises a bond coat portion and a thermal barrier coating portion prior to the applying of the bond recoat and the applying of the thermal barrier recoat. ### Claim 5 (depends on 1) The recoating process of claim 1, wherein the partially-stripped turbine blade comprises a bond coat portion and is substantially devoid of a thermal barrier coating of the thermal barrier coating system prior to the applying of the bond recoat and applying of the thermal barrier recoat. ### Claim 6 (depends on 1) The recoating process of claim 1, wherein the partially-stripped turbine blade has a stepped configuration. ### Claim 7 (depends on 1) The recoating process of claim 1, comprising inspecting the partially-stripped turbine blade prior to applying the bond recoat. ### Claim 8 (depends on 1) The recoating process of claim 1, wherein the applying of the bond recoat to the partially-stripped turbine blade includes applying a first bond recoat to the substrate and applying a second bond recoat to the first bond recoat. ### Claim 9 (depends on 1) The recoating process of claim 1, wherein the applying of the bond recoat is devoid of masking. ### Claim 10 (depends on 1) The recoating process of claim 1, wherein the applying of the bond recoat to the partially-stripped turbine blade does not apply the bond recoat outside of the stripped region of the partially-stripped turbine blade. ### Claim 11 (depends on 1) The recoating process of claim 1, wherein the applying of the bond recoat to the partially-stripped turbine blade applies the bond recoat outside of the stripped region of the partially-stripped turbine blade. ### Claim 12 (depends on 1) The recoating process of claim 1, wherein the applying of the thermal barrier recoat is devoid of masking. ### Claim 13 (depends on 1) The recoating process of claim 1, wherein the applying of the thermal barrier recoat to the partially-stripped turbine blade does not apply the thermal barrier recoat outside of the stripped region of the partially-stripped turbine blade. ### Claim 14 (depends on 1) The recoating process of claim 1, wherein the applying of the thermal barrier recoat to the partially-stripped turbine blade applies the thermal barrier recoat outside of the stripped region of the partially-stripped turbine blade. ### Claim 15 (depends on 1) The recoating process of claim 1, wherein the recoated turbine blade comprises the bond recoat, and the bond recoat abuts a bond coating portion of the thermal barrier coating system. ### Claim 16 (depends on 1) The recoating process of claim 1, wherein the recoated turbine blade comprises the thermal barrier recoat, and the thermal barrier recoat abuts a thermal barrier coating portion of the thermal barrier coating system. ### Claim 17 (depends on 1) The recoating process of claim 1, wherein the recoated turbine blade has a stepped configuration. ### Claim 18 (depends on 1) The recoating process of claim 1, wherein the removing of the portion of the thermal barrier coating system from the coated turbine blade is performed without removal of the coated turbine blade from a turbine system. ### Claim 19 A recoating process, comprising: providing a coated turbine blade, the coated turbine blade having a thermal barrier coating system positioned on a substrate; then removing a portion of the thermal barrier coating system to form a partially-stripped turbine blade having a stripped region, a bond coating portion, a thermal barrier coating portion, and a stepped configuration; then applying a bond recoat to the stripped region of the partially-stripped turbine blade; and then applying a thermal barrier recoat to the bond recoat to form a recoated turbine blade; wherein the recoated turbine blade comprises the bond coating portion abutting the bond recoat, the thermal barrier coating portion abutting the thermal barrier recoat, and the stepped configuration. ### Claim 20 A recoated turbine blade, comprising: a substrate; a bond coat portion abutting a bond recoat; a thermal barrier coating portion abutting a thermal barrier recoat; and a stepped configuration of the bond coating portion, the bond coating, the thermal barrier portion, and the thermal barrier coating on the substrate; wherein the bond coat portion and the thermal barrier coating portion include post-operational features.