# US 2008/0187773 A1 · Method for the Protection of Titanium Alloys Against High Temperatures and Material Produced > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0187773 A1 - Document ID: US20080187773A1 - Status: Published application - Kind: A1 - Application number: 11/815,806 - Filed: 2005-02-11 - Published: 2008-08-07 - Earliest claimed: 2005-02-11 - Assignees: Fundacion Inasmet - Inventors: Estibalitz Erauzkin Bilbao; Sergio Armada Nieto; Elena Silveira Fernandez; Georgy Barykin - Web page: https://patentgrep.com/patent/US20080187773A1 ## CPC - C23C 28/3455: {with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer} - C23C 4/06: Metallic material - C23C 4/073: containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements - C23C 4/11: Oxides - C23C 4/126: Detonation spraying - C23C 4/134: Plasma spraying - C23C 28/324: {with at least one metal matrix material layer comprising a mixture of at least two metals or metal phases or a metal-matrix material with hard embedded particles, e.g. WC-Me} - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - Y10T 428/12576: Boride, carbide or nitride 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The method allows the production of a cermet coating which is composed of chromium carbide particles embedded in a nickel-chromium matrix, produced by thermal spraying on titanium alloys, which avoids the oxidation and the diffusion of oxygen therein at temperatures of up to 700° C. Additionally, a ceramic layer is deposited on the cermet coating which acts as thermal barrier. ## Claims ### Claim 1 Method for the protection of titanium alloys against high temperatures, characterized in that it comprises the deposition of a cermet coating on the titanium alloy which avoids the oxidation and oxygen diffusion of said alloy at temperatures over 500°. ### Claim 2 (depends on 1) Method for the protection of titanium alloys against high temperatures according to claim 1, characterized in that the cermet coating is composed of chromium carbides embedded in a metal matrix. ### Claim 3 (depends on 1) Method for the protection of titanium alloys against high temperatures according to claim 1, characterized in that the metal matrix is a nickel-base metal alloy with contents of other metallic elements selected from chromium, iron, cobalt, silicon and molybdenum. ### Claim 4 (depends on 1) Method for the protection of titanium alloys against high temperatures, according to claim 1, characterized in that the cermet coating is produced by thermal spraying. ### Claim 5 (depends on 4) Method for the protection of titanium alloys against high temperatures according to claim 4, characterized in that the thermal spray method is a HFPD (high frequency pulse detonation) thermal spray method. ### Claim 6 (depends on 5) Method for the protection of titanium alloys against high temperatures according to claim 5, characterized in that the thermal spraying is performed using propylene (between 35 and 55 slpm) and oxygen (between 130 and 155 slpm) as gases and at a detonation frequency between 60 and 90 Hertz. ### Claim 7 (depends on 1) Method for the protection of titanium alloys against high temperatures, according to claim 1, characterized in that it additionally comprises the deposition of a layer of ceramic material, on the cermet layer. ### Claim 8 (depends on 7) Method for the protection of titanium alloys against high temperatures, according to claim 7, characterized in that the layer of ceramic material is a layer of partially yttria-stabilized zirconium. ### Claim 9 (depends on 7) Method for the protection of titanium alloys against high temperatures, according to claim 7, characterized in that the deposition of the layer of ceramic material is performed by a thermal plasma spray method. ### Claim 10 (depends on 9) Method for the protection of titanium alloys against high temperatures, according to claim 9, characterized in that the gases used for the thermal spraying are argon and hydrogen, performing the process at an approximate intensity of 700 A. ### Claim 11 Material composed of a coating and a substrate characterized in that the coating consists of a cermet layer deposited on the substrate which is a titanium alloy with the special characteristic that the formation of an alphaα phase is not produced in the substrate interface, as a consequence of the deposition process of the cermet layer. ### Claim 12 (depends on 11) Material, according to claim 11, characterized in that the cermet coating is composed of chromium carbides embedded in a metal matrix. ### Claim 13 (depends on 12) Material according to claim 12, characterized in that the metal matrix is a nickel-base metal alloy with contents of other metallic elements selected from chromium, iron, cobalt, silicon and molybdenum. ### Claim 14 (depends on 11) Material according to claim 11, characterized in that the cermet coating is produced by thermal spraying. ### Claim 15 (depends on 14) Material according to claim 14, characterized in that the thermal spray method is a HFPD (high frequency pulse detonation) thermal spray method. ### Claim 16 (depends on 15) Material according to claim 15, characterized in that the thermal spraying is performed using propylene (between 35 and 55 slpm) and oxygen (between 130 and 155 slpm) as gases and at a detonation frequency between 60 and 90 Hertz. ### Claim 17 (depends on 11) Material according to claim 11, characterized in that it additionally comprises a ceramic layer deposited on the cermet layer. ### Claim 18 (depends on 17) Material according to claim 17, characterized in that the layer of ceramic material is a zirconium layer partially stabilized with yttria. ### Claim 19 (depends on 17) Material according to claim 17, characterized in that the deposition of the layer of ceramic material is performed by a thermal plasma spray method. ### Claim 20 (depends on 19) Material according to claim 19, characterized in that the gases used for the thermal spraying are argon and hydrogen, performing the process at an approximate intensity of 700 A.