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EP2778257B1 - Procédé de fabrication de revêtements de barrière thermique - Google Patents

Procédé de fabrication de revêtements de barrière thermique Download PDF

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Publication number
EP2778257B1
EP2778257B1 EP14158148.8A EP14158148A EP2778257B1 EP 2778257 B1 EP2778257 B1 EP 2778257B1 EP 14158148 A EP14158148 A EP 14158148A EP 2778257 B1 EP2778257 B1 EP 2778257B1
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EP
European Patent Office
Prior art keywords
thermal barrier
barrier coating
feedstock
binder
substrate
Prior art date
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Active
Application number
EP14158148.8A
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German (de)
English (en)
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EP2778257A2 (fr
EP2778257A3 (fr
Inventor
Surinder Singh Pabla
Joshua Lee Margolies
Eklavya Calla
Padmaja Parakala
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
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Publication date
Priority claimed from US13/801,478 external-priority patent/US9347126B2/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of EP2778257A2 publication Critical patent/EP2778257A2/fr
Publication of EP2778257A3 publication Critical patent/EP2778257A3/fr
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Publication of EP2778257B1 publication Critical patent/EP2778257B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles

Definitions

  • the present invention is directed to a process of fabricating thermal barrier coatings and turbine components having thermal barrier coatings. More specifically, the present invention is directed to cold spray to form thermal barrier coatings.
  • thermal barrier coatings are often used as sealing structures for hot gas path components.
  • An ability of the TBC to protect the hot gas path components from the rising temperatures is limited by a thermal conductivity of the TBC. The lower the thermal conductivity of the TBC, the higher the temperature the TBC can withstand.
  • TBC deposition including electron beam physical vapor deposition (EBPVD) and air plasma spraying (APS), are unable to form the desired porosity while maintaining a required mechanical strength in the TBC.
  • EBPVD electron beam physical vapor deposition
  • APS air plasma spraying
  • K value constituents like lanthana for example, cannot be deposited by APS to the thicknesses required for effective TBC layer due to the formation of a glass phase that disrupts the spraying process.
  • WO 2004/007787 discloses a layer system comprising a substrate with an intermediate layer and an outer heat insulating layer. The material of the intermediate layer is partially formed in the heat insulating layer. One of the layers is applied by cold gas spraying.
  • WO 02/061177 discloses a process for applying a thermal barrier coating to a turbine component including the step of depositing a bond coating layer by a cold spray process.
  • the layer of bond coating material may have different depths in difference areas of the component, and it may have different compositions across its depth.
  • the precise control afforded by the cold spray material deposition step allows the surface of the bond coating material layer to be formed with a predetermined surface roughness or with a plurality of micro-ridges in order to optimize its bond to the overlying ceramic insulating layer.
  • EP 2072634 discloses a method for coating a substrate of a turbine engine component comprising cold spray depositing a metal-based material onto a surface of the substrate, and heating the deposited metal-based material to increase the porosity of the deposited metal-based material.
  • a process of fabricating a thermal barrier coating includes cold spraying a substrate with a feedstock to form a thermal barrier coating and concurrently oxidizing one or more of the substrate, the feedstock, and the thermal barrier coating.
  • the cold spraying is in a region having an oxygen concentration of at least 10%.
  • Embodiments of the present disclosure for example in comparison to processes not employing one or more of the features disclosed herein, provide increased ceramic retention in deposits, increased oxide content of the deposits, graded porosity layers, mica fillers, increased porosity, decreased thermal conductivity value, controlled thermal barrier coating microstructure, and combinations thereof.
  • FIGS. 1 and 2 show articles 100, such as a turbine shroud positioned adjacent to a turbine blade 105, having a thermal barrier coating 102.
  • the thermal barrier coating 102 forms a turbine component, such as a turbine seal.
  • the thermal barrier coating 102 is positioned directly on a substrate 101 of the article 100, as shown in FIG. 1 , or is positioned on one or more intermediate layers 202 on the substrate 101, as shown in FIG. 2 .
  • the thermal barrier coating 102 forms a low thermal conductivity portion in comparison to other portions of the article 100.
  • the article 100 is any suitable metallic component, such as a stationary component or a rotating part. Suitable metallic components include, but are not limited to, compressor components, turbine components, turbine blades, and turbine buckets. As used herein, the term "metallic" is intended to encompass metals, alloys, composite metals, intermetallic materials, or any combination thereof. In one embodiment, the article 100 includes or is stainless steel. In another embodiment, the article 100 includes or is a nickel-based alloy. Other suitable alloys include, but are not limited to, cobalt-based alloys, chromium based alloys, carbon steel, and combinations thereof. Suitable metals include, but are not limited to, titanium, aluminum, and combinations thereof.
  • the thermal barrier coating 102 is positioned on any suitable portion or surface of the article 100.
  • the thermal barrier coating 102 is a portion of the article 100, such as, a hot gas path of a turbine, a fillet, the turbine seal, a compressor seal, a labyrinth seal, a brush seal, a flexible seal, a damping mechanism, a cooling mechanism, bucket interiors, pistons, heat exchangers, or combinations thereof.
  • the thermal barrier coating 102 is formed by cold spraying of a solid/powder feedstock 402 (see FIGS. 4 and 5 ) in a region 103 having an oxygen concentration of at least 10%. In one embodiment, the oxygen concentration is above about 50%. In one embodiment, the oxygen concentration is above about 70%.
  • the feedstock 402 includes, but is not limited to, ceramic particles and a binder 404 ( FIG. 4 ).
  • the thermal barrier coating 102 includes a network of pores 104. In one embodiment, the pores 104 are have limited visual discernibility and/or have a fine porosity. In another embodiment, the pores 104 are complex and do not have a consistent geometry, similar to steel wool, and/or have a coarse porosity.
  • the pores 104 are any suitable size and within any suitable density. Suitable sizes of the pores 104 are between about 1 and about 100 microns, between about 10 and about 50 microns, between about 30 and about 40 microns, between about 50 and about 100 microns, between about 50 and about 70 microns, or a combination thereof. Suitable densities of the pores 104 are between about 5% and about 85%, about 15% and about 75%, about 15% and about 25%, about 25% and about 75%, about 2% and about 15%, and combinations and sub-combinations thereof.
  • the thermal barrier coating 102 is positioned on two of the intermediate layers 202, one of which is positioned on the substrate 101 of the article 100.
  • the metallic structure is positioned on three, four, five, or more of the intermediate layers 202.
  • the article 100 is prepared (step 302), for example, by cleaning the surface of the article 100.
  • the thermal barrier coating 102 is then applied to the article 100 by cold spray (step 304).
  • the cold spraying (step 304) includes spraying the feedstock 402 (see FIGS. 4 and 5 ) and the processing takes place mostly in a solid condition with less heat than processes such as welding or brazing.
  • the cold spraying (step 304) applies the thermal barrier coating 102 to a predetermined region.
  • the predetermined region of the thermal barrier coating 102 is capable of being at a tighter tolerance than otherwise possible without use of masking.
  • the thermal barrier coating 102 is applied without using masking and is capable of being reproduced. In one embodiment of the article 100, the thermal barrier coating 102 is or includes a reproducible feature that is capable of being replicated without masking. In one embodiment, the thermal barrier coating 102 has a tensile adhesion strength greater than a predetermined amount, for example, greater than 6.89 MPa (1000 PSI), greater than 20.68 MPa (3000 PSI), greater than 34.47 MPA (5000 PSI), or greater than 68.94 MPa (10,000 PSI).
  • the solid feedstock 402 includes ceramic particles, such as yttrium stabilized zirconium, ytterbium zirconium, pyrochlores, other suitable ceramic particles, or combinations thereof.
  • the ceramic particles include rare earth stabilized zirconia, stabilized by a rare earth metal selected from the group consisting of Y, Yb, Gd, Nd, La, Sc, Sm, and combinations thereof.
  • the ceramic particles include non-rare earth stabilized zirconia, stabilized by a material selected from the group consisting of Ca, MG, Ce, Al, and combinations thereof.
  • the solid feedstock 402 includes ceramic particles clad in a binder or adhesive.
  • the ceramic particles in the solid feedstock 402 have a predetermined maximum dimension, for example, less than about 20 micrometers, less than about 10 micrometers, between about 5 micrometers and about 20 micrometers, between about 5 micrometers and about 10 micrometers, at about 10 micrometers, at about 5 micrometers, or any suitable combination or sub-combination thereof.
  • the solid feedstock 402 includes sintering aids, such as Al 2 O 3 , SiO 2 , other suitable sintering aids, or combinations thereof.
  • the solid feedstock 402 includes mica.
  • Mica is a silicate (phyllosilicate) mineral that includes several closely related materials having close to perfect basal cleavage. Micas have the general formula X 2 Y 4 - 6 Z 8 O 20 (OH,F) 4 . Common micas include, but are not limited to, biotite, lepidolite, muscovite, phlogopite, zinnwaldite, and combinations thereof. Mica decomposes between temperatures of about 850°C to about 1200°C. In one embodiment, mica is used as a filler material below its decomposition temperature. In one embodiment, mica is heated above its decomposition temperature, forming the pores 104 in the thermal barrier coating 102.
  • the solid feedstock 402 is prepared by a method including, but not limited to, mixing, milling, spray drying, coating, contacting the feedstock with a plasma flame, or a combination thereof.
  • the solid feedstock 402 is prepared by coating the ceramic particles with a metallic material, for example, using an electroless method to coat the ceramic particles with nickel.
  • the solid feedstock 402 is prepared by passing the solid feedstock 402 material through a plasma flame and collecting the sprayed material.
  • the solid feedstock 402 is mixed with the binder 404 within or prior to a converging portion 406 of a converging-diverging nozzle 408.
  • the solid feedstock 402 is a substantially homogenous mixture of the ceramic particles, and the binder 404.
  • the binder 404 has a melting point lower than the ceramic particles. Additionally or alternatively, the binder 404 has a ductility greater than the ceramic particles (at conditions of cold spray).
  • the solid feedstock 402 is pre-mixed with the binder 404 providing further adjustability, for example, at any suitable volume concentration.
  • Suitable volume concentrations for the binder 404 are between about 5% and about 90%, between about 5% and about 10%, between about 5% and about 15%, between about 5% and about 20%, between about 5% and about 30%, between about 5% and about 50%, between about 5% and about 60%, between about 5% and about 70%, between about 5% and about 80%, between about 10% and about 90%, between about 20% and about 90%, between about 30% and about 90%, between about 40% and about 90%, between about 50% and about 90%, between about 60% and about 90%, between about 70% and about 90%, between about 80% and about 90%, between about 30% and about 60%, between about 40% and about 50%, between about 10% and about 15%, or any suitable combination or sub-combination thereof.
  • the binder 404 is a polymer, a mixture of polymers, a non-polymeric material, a metallic material, any material suitable for use in cold spray applications and/or with thermal barrier coatings, or combinations thereof.
  • the binder 404 is or includes polyester.
  • the binder 404 is or includes titanium, aluminum, nickel, cobalt, iron, alloys thereof, polyamide (nylon), nylon with glass fiber reinforcement, poly butylene terepthalate (PBT), polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), a blend of polyphenylene oxide and polystyrene, or combinations thereof.
  • a combination of polymers is based upon melting points.
  • the thermal barrier coating 102 includes several layers each having the binder 404, for example, an exterior thermal barrier layer 602, an intermediate thermal barrier layer 604, and an interior thermal barrier layer 606.
  • the volume concentration of the binder 404 is adjusted, thereby adjusting the porosity of the thermal barrier coating 102 as a whole.
  • the external thermal barrier layer 602 includes binder of a first density (for example, about 25%), the intermediate thermal barrier layer 604 includes binder of a second density (for example, a greater amount than the first density and/or between about 25% and about 40%), and the interior thermal barrier layer 606 includes binder of a third density (for example, a greater amount than the second density and/or between about 40 and about 75%).
  • the thermal barrier coating 102 and/or one or more of the layers of the thermal barrier coating is/are substantially devoid of metal or metallic materials.
  • the thermal barrier coating 102 includes, but is not limited to, low thermal conductivity chemistries such as 68.9 wt% Yb 2 O 3 , balance ZrO 2 , high Y 55wt% ZrO 2 , or combinations thereof. In one embodiment, the thermal barrier coating 102 includes, but is not limited to, ultra low thermal conductivity chemistries such as 30.5 wt% Yb 2 O 3 , 24.8 wt% La 2 O 3 , balance ZrO 2 , and combinations thereof.
  • the cold spraying (step 304) forms the thermal barrier coating 102 by impacting the solid feedstock 402 particles.
  • the cold spraying (step 304) substantially retains the phases and microstructure of the solid feedstock 402.
  • the cold spraying (step 304) is continued until the thermal barrier coating 102 is within a desired thickness range or slightly above the desired thickness range (to permit finishing), for example, between about 0.0254mm (1mil) and about 50.8mm (2000 mils), between about 0.025mm (1mil) and about 2.54mm (100mils), between about 2.54mm (10mils) and about 0.508mm (20mils), between about 0.508mm (20mils) and about 0.726mm (30mils), between about 0.762mm (30mils) and about 1.016mm (40 mils), between about 1.016mm (40mils) and about 1.27mm (50mils), between about 0.508mm (20mils) and about 1.016mm (40mils), or any suitable combination or sub-combination thereof.
  • the solid feedstock 402 is pre-heated with a laser beam 413 from a laser 411 prior to cold spraying (step 304).
  • the pre-heating of the solid feedstock 402 increases retention of the solid feedstock 402 in the thermal barrier coating 102 deposits.
  • the laser 411 is utilized to heat the substrate 101 prior to cold spraying (step 304).
  • the laser 411 is utilized to heat the substrate 101 after the cold spraying (step 304). Heating the substrate 101 with the laser 411 increases a temperature surrounding the substrate 101, also leading to increased retention of the feedstock 402 in the thermal barrier coating 102. The heating of the substrate 101 with the laser 411 also increases an oxygen concentration surrounding the substrate.
  • An increased retention of the feedstock 402 forms an increased porosity in the thermal barrier coating 102.
  • the increased porosity in the thermal barrier coating 102 decreases the thermal conductivity of the thermal barrier coating 102.
  • the porosity of the thermal barrier coating 102 is between about 20% and about 40%, between about 20% and about 30%, between about 25% and about 35%, between about 30% and about 35%, between about 30% and about 40%, or any suitable combination or sub-combination thereof.
  • the cold spraying includes accelerating the solid feedstock 402 through the converging-diverging nozzle 408.
  • the solid feedstock 402 is accelerated to at least a predetermined velocity or velocity range, for example, based upon the below equation for the converging-diverging nozzle 408 as is shown in FIG. 4 :
  • a A * 1 M 2 ⁇ + 1 1 + ⁇ ⁇ 1 2 M 2 ⁇ + 1 2 ⁇ ⁇ 1
  • Equation 1 "A” is the area of nozzle exit 405 and “A*" is the area of nozzle throat 407. " ⁇ ” is the ratio C p /C v of the process gas 409 being used (C p being the specific heat capacity at constant pressure and C v being the specific heat capacity at constant volume). The gas flow parameters depend upon the ratio of A/A*.
  • M exit gas velocity Mach number
  • Gas having higher value for " ⁇ ” results in a higher Mach number.
  • the parameters are measured/monitored by sensors 410 positioned prior to the converging portion 406.
  • the solid feedstock 402 impacts the article 100 at the predetermined velocity or velocity range and the solid feedstock 402 bonds to the article 100 to form the thermal barrier coating 102.
  • the solid feedstock 402 is cold sprayed (step 304) through the converging-diverging nozzle 408 using a process gas 409.
  • the process gas 409 includes, but is not limited to, helium, nitrogen, oxygen, air, or combinations thereof.
  • the process gas 409 provides an increase in oxygen concentration in the region 103 where the thermal barrier coating 102 is formed.
  • an inlet gas provides an increase in oxygen concentration in the region 103 where the thermal barrier coating 102 is formed.
  • the increase in oxygen concentration increases an oxidation of the metallic components in the thermal barrier coating 102.
  • An oxide concentration in the thermal barrier coating 102 is increased by the increase in the oxidation of the metallic components.
  • the nozzle 408 is positioned a predetermined distance from the article 100, for example, between about 10 mm and about 150 mm, between about 10 mm and about 50 mm, between about 50 mm and about 100 mm, between about 10 mm and about 30 mm, between about 30 mm and about 70 mm, between about 70 mm and about 100 mm, or any suitable combination or sub-combination thereof.
  • the cold spraying includes impacting the solid feedstock 402 in conjunction with a second feedstock, for example, including the binder 404.
  • the binder 404 is injected with the solid feedstock 402, injected separate from the solid feedstock 402 but into the same nozzle 408, injected into a separate nozzle 408, or injected into a diverging portion 412 of the same nozzle 408 or the separate nozzle 408.
  • the effect of heat, such as degradation of the binder 404, from a processing gas is reduced or eliminated.
  • the binder 404 includes a material susceptible to damage, such as degradation from the heat of the processing gas, up to about 1500°C.
  • the injection in the diverging portion 412 reduces or eliminates such degradation.
  • Another embodiment uses a single feedstock, where the material is a ceramic powder, with each individual particle clad in the binder 404.
  • the cold spraying includes accelerating the solid feedstock 402 and a separate feedstock 502 of the binder 404 to at least a predetermined velocity or velocity range, for example, based upon the equation 1.
  • the cold spraying (step 304) corresponding to FIG. 5 involves nozzles 408 designed with a combined A/A* ratio to suit spraying a particular material (either a metallic or low melting).
  • the cold spraying (step 304) uses different gases in different nozzles 408 and/or includes relative adjustment of other parameters.
  • multiple nozzles 408 are used to handle incompatibility associated with feedstock having a metallic phase and feedstock having a low melting phase, such as the separate feedstock 502 and the binder 404.
  • the solid feedstock 402 and the separate feedstock 502 impact the article 100 at the predetermined velocity or velocity range and the solid feedstock 402 bonds to the article 100 with the separate feedstock 502 and/or the binder 404 being entrained within the solid feedstock 402 and/or also bonding to the article 100.
  • the parameters are measured/monitored by sensors 410 positioned prior to the converging portion 406.
  • the porosity of the thermal barrier coating 102 is controlled by varying an amount of the binder 404 applied in comparison to an amount of the solid feedstock 402 applied.
  • the thermal conductivity of the thermal barrier coating 102 is adjusted.
  • the amount of the binder 404 is adjustably controlled by varying the amount of the binder 404 applied in comparison to the amount of the solid feedstock 402 while cold spraying (step 304). In this embodiment, the porosity of the thermal barrier coating 102 varies based upon these amounts.
  • multiple layers are formed by cold spraying (step 304) more than one application of the binder 404 (or another low-melt material) and the solid feedstock 402 with more than one relative amount of the binder 404 in comparison to the solid feedstock 402.
  • the intermediate layer 202 (see FIG. 2 ) positioned proximate to the substrate 101 or abutting the substrate 101 is less porous than the intermediate layer 202 (see FIG. 2 ) positioned distal from the substrate 101 or at the surface of the thermal barrier coating 102 by the amount of the binder 404 applied to form the intermediate layer proximate to the substrate 101 being lower than the amount of the binder 404 applied to form the intermediate layer distal from the substrate 101.
  • the process 300 continues after the cold spraying (step 304) by removing (step 306) the binder 404.
  • excess amounts of the binder 404 are removed (step 306) by heating the binder 404 and the solid feedstock 402 after the cold spraying (step 304) to evaporate, burn, dissolve and/or sublime the excess amounts of the binder 404.
  • the removing (step 306) of the excess amounts of the binder 404 forms the pores 104.
  • the process 300 continues after the cold spraying (step 304) by further oxidizing metallic components in at least a portion of the thermal barrier coating 102.
  • the further oxidation increases the oxide content of the thermal barrier coating 102.
  • further oxidation is performed by heating the thermal barrier coating 102 to a temperature sufficient to cause oxidation.
  • a chemical treatment is used to cause oxidation in the thermal barrier coating 102.
  • the oxide concentration in the thermal barrier coating 102 is increased by the oxidizing.
  • the process 300 includes finishing (step 308) the thermal barrier coating 102 and/or the article 100, for example, by grinding, machining, shot peening, or otherwise processing. Additionally or alternatively, in one embodiment, the process 300 includes sintering the thermal barrier coating 102, treating (for example, heat treating) the thermal barrier coating 102, or other suitable process steps. In one embodiment, the treating converts the thermal barrier coating 102 from a composite coating into a ceramic coating.
  • the ceramic coating includes titania, alumina, nickel oxide, cobalt oxide, iron oxide, nickel-cobalt oxide, nickel-iron oxide, cobalt-iron oxide, nickel-ytrria oxide, cobalt-ytrria oxide, iron-ytrria oxide, polyamide, nylon with glass fiber reinforcement, poly butylene terepthalate, polypropylene, polyethylene, polyphenylene sulfide, a blend of polyphenylene oxide and polystyrene, or a combination thereof.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (15)

  1. Procédé de fabrication d'un revêtement formant une barrière thermique, le procédé comprenant :
    la pulvérisation à froid sur un substrat d'une matière première pour produire un revêtement formant une barrière thermique ; et
    l'oxydation simultanée du substrat et/ou de la matière première et/ou du revêtement formant la barrière thermique ;
    dans lequel la pulvérisation à froid se fait dans une zone présentant une concentration en oxygène au moins égale à 10 %.
  2. Procédé selon la revendication 1, dans lequel la concentration en oxygène est assurée par un gaz de traitement ou un gaz d'entrée.
  3. Procédé selon la revendication 2, dans lequel le gaz de traitement est l'air.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la concentration en oxygène est supérieure à environ 50 %.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel la concentration en oxyde augmente sous l'effet d'une augmentation de la concentration en oxygène.
  6. Procédé selon l'une quelconque des revendications précédentes comprenant, en outre, l'oxydation d'au moins une partie du revêtement formant la barrière thermique.
  7. Procédé selon la revendication 6, dans lequel l'oxydation comprend une cuisson dans une atmosphère contenant de l'oxygène ou dans lequel l'oxydation comprend un traitement chimique.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel la matière première contient du mica et dans lequel une décomposition du mica entraîne la formation de pores dans le revêtement formant la barrière thermique.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel le revêtement formant la barrière thermique présente une porosité progressive.
  10. Procédé selon l'une quelconque des revendications précédentes, dans lequel la matière première comprend, en outre, un mélange homogène de particules de céramique et d'un liant.
  11. Procédé selon la revendication 10, dans lequel les particules de céramique comprennent un matériau choisi dans le groupe constitué de 68,9 % en poids de Yb2O3, le reste étant constitué de ZrO2, dont 55 % en poids de ZrO2 à forte teneur en Y, et de combinaisons de ceux-ci ou dans lequel les particules de céramique comprennent un matériau choisi dans le groupe constitué de 30,5 % en poids de Yb2O3, de 24,8 % en poids de La2O3, le reste étant constitué de ZrO2, et de combinaisons de ceux-ci.
  12. Procédé selon l'une quelconque des revendications précédentes, comprenant, en outre, le chauffage de la matière première avant la pulvérisation à froid.
  13. Procédé selon l'une quelconque des revendications précédentes comprenant, en outre, le chauffage du substrat avant la pulvérisation à froid.
  14. Procédé selon la revendication 12, comprenant le chauffage de la matière première à l'aide d'un laser.
  15. Procédé selon la revendication 13, comprenant le chauffage du substrat à l'aide d'un laser.
EP14158148.8A 2013-03-13 2014-03-06 Procédé de fabrication de revêtements de barrière thermique Active EP2778257B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/801,478 US9347126B2 (en) 2012-01-20 2013-03-13 Process of fabricating thermal barrier coatings

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EP2778257A2 EP2778257A2 (fr) 2014-09-17
EP2778257A3 EP2778257A3 (fr) 2014-12-24
EP2778257B1 true EP2778257B1 (fr) 2017-05-10

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CN118580101A (zh) * 2024-05-20 2024-09-03 西北工业大学 一种用于制备环境障涂层的方法

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US6444259B1 (en) * 2001-01-30 2002-09-03 Siemens Westinghouse Power Corporation Thermal barrier coating applied with cold spray technique
EP1382707A1 (fr) * 2002-07-17 2004-01-21 Siemens Aktiengesellschaft Systeme stratifie
US8147982B2 (en) * 2007-12-19 2012-04-03 United Technologies Corporation Porous protective coating for turbine engine components

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HUE035690T2 (en) 2018-05-28
EP2778257A3 (fr) 2014-12-24

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