EP3455387A1 - Protective coating for a thermally stressed structure - Google Patents
Protective coating for a thermally stressed structureInfo
- Publication number
- EP3455387A1 EP3455387A1 EP17737732.2A EP17737732A EP3455387A1 EP 3455387 A1 EP3455387 A1 EP 3455387A1 EP 17737732 A EP17737732 A EP 17737732A EP 3455387 A1 EP3455387 A1 EP 3455387A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- protective coating
- coating
- target
- thermally stressed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/081—Oxides of aluminium, magnesium or beryllium
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
- C23C28/3215—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer at least one MCrAlX layer
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
- C23C28/3455—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/288—Protective coatings for blades
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/36—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including layers graded in composition or physical properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/90—Coating; Surface treatment
Definitions
- the invention relates to a method for arranging a
- thermal barrier coatings are used to increase the material temperature
- Thermal barrier coatings such as are required in gas turbines that are exposed to very high operating temperatures ⁇ Tempe.
- thermal insulation hot gas components such as blades and combustor parts
- a temperature field is formed, which makes it ⁇ light that during operation coverings with components such as Kal ⁇ zium, magnesium, aluminum and silicon deposit.
- CMAS which is derived from the chemical symbols Ca, Mg, Al and Si.
- These deposits or parts of these coatings can chemically react with ceramic material of the thermal barrier coating and / or penetrate into the thermal barrier coating.
- the thermal insulation layer is ⁇ during the operation as the corresponding gas-turbine bine destroyed.
- Other deposits which are formed from nickel or iron-containing deposits of oil contaminants, contaminated pipes or connections from the compressor, the thermal barrier coating by stiffening
- a first aspect of the invention relates to a method for arranging a protective coating comprising at least one alumina-containing first layer on a thermally bean ⁇ spruchten structure by means of cathodic sparks evaporation, wherein the thermally stressed structure comprises at least one thermal barrier coating, comprising the steps:
- the protective coating is applied as a homogeneous alpha-alumina-based layer.
- target is a term known to a person skilled in the art for a material which is partially melted and vaporized in the said evaporation process.
- substrate is a term known to a person skilled in the art for a material on which the evaporated target material is condensed and deposited, so that a layer is deposited on the substrate.
- the substrate is here represented by the said thermal barrier coating.
- layer refers, if not sourced from ⁇ explicitly to something else, is a layer constituting the protective coating.
- RKFV alumina-based layer on the Wär ⁇ medämm Anlagen is deposited in the process, wherein the target is evaporated, which is connected as the cathode in the arc vaporization. The evaporation takes place in vacuum under controlled oxygen partial pressure or controlled oxygen gas flow.
- the method is advantageous because it allows a homogeneous application of a protective coating, as may be the encryption of the material in an oxygen atmosphere steam at least one homogeneous layer of oxide in a single process step brought to ⁇ . There is no time-consuming treatment Nachbehand ⁇ required. If necessary, additional Behandlun ⁇ gen of cooling holes which may be present in the structure required, but represent only a small effort.
- the target additionally comprises the metal chromium.
- the proportion of chromium in the target promotes Ausbil ⁇ dung a corundum structure in a forming Al-Cr-O solid solution, and that even at relatively low temperatures of 500 ° C and below.
- the content of chromium is particularly preferably dimensioned such that the lattice constant of the Al-Cr-O mixed crystal structure formed during the coating is adapted in the region lying between the corundum and the esculite.
- Vegard's rule is used, according to which the lattice constant of a crystal of the percentage of part of the components is linearly dependent.
- a high proportion of chromium is particularly advantageous because a protective layer is formed, which results from a diffusion of chromium from a chromium-containing material (Schutzbe- layering) in a subsidiary insulation ⁇ layer) and in which the corundum structure of Al - Cr-O mixed crystal receives.
- the Al-Cr-O mixed crystal structure can be in various aspects
- Crystallite sizes may be affected by the process conditions (especially the chromium content, the oxygen partial pressure prevailing during coating and the temperature of the substrate, i.e. the thermal barrier coating to which the protective coating is applied) during the film deposition and be controlled accordingly.
- the applied layers of the protective coating depending on the conditions e.g. X-ray amorphous or in other cases in an X-ray analysis clearly show the corundum structure, the positions of the Bragg peaks corresponding to the chromium content between those of pure corundum and those of Eskolaites lie.
- the target preferably comprises additional elements selected from the group comprising titanium, hafnium, silicon and zirconium.
- Other elements may also be included in the target to promote certain properties.
- the elements are selected in adaptation to the material to be coated or to influence certain properties of the layer to be produced.
- the Lös ⁇ schwssky of said additional elements in aluminum should not be significantly exceeded. In other words, the concentration of the elements can be so high that their solubility limit in aluminum is roughly reached, but not higher if possible.
- the concentrations of the additional elements may be higher in order to adapt the properties of the material to specific requirements, for example, to adapt the thermal expansion coefficients of the synthesized layer and the underlying material of the thermal barrier coating to each other.
- the tempera ture ⁇ of the substrate is preferably during coating
- the thickness of the applied protective coating is preferably between 5 and 500 ⁇ m.
- the thickness is in depen ⁇ dependence selected from the quality of the surface on which the protective coating is arranged the layer, especially the top ⁇ surface of the thermal barrier coating.
- At least a first and a second layers are applied for producing the protective coating. You can also apply three layers.
- the RKFV allows ⁇ front part by way of producing a gradient between the heat insulating layer or applied to the thermal barrier coating material and a corundum structure according to the invention
- the gradient can also be present in a layer.
- a protective coating of several layers it is therefore possible to proceed from one structure to another structure via a gradient. This procedure advantageously allows a targeted design of a
- Protective coating especially of several layers, in terms of their chemical composition, which should be placed on a substrate to be protected against hot gas erosion.
- a second aspect of the invention relates to a protective coating produced by a method according to the invention. has been. So that the protective coating of the invention comprises a homogeneous layer of aluminum oxide on, be ⁇ vorzugt of Al-Cr-O-mixed crystals, and is applied by a reactive cathodic arc evaporation.
- a third aspect of the invention relates to a component of a gas turbine with a protective coating according to the invention.
- the component thus has a thermally stressed structure in the context of the invention, or it is this thermally bean ⁇ spruchte structure.
- Protective coating e.g. on combustor parts or blades of a gas turbine.
- a fourth aspect of the invention relates to a gas turbine with at least one component according to the invention.
- the erfindungsge ⁇ Permitted gas turbine thus has at least one component, such as a combustion chamber part or a blade, which has a thermal barrier ⁇ layer on which a protective coating is applied according to the invention.
- Figure 1 is a schematic representation of a component with an embodiment of an inventive
- Figure 2 is a schematic representation of a component with a further embodiment of the protective coating according to the invention.
- FIG. 3 shows a flow diagram of an embodiment of a method according to the invention.
- a layer system 1 comprises a base material 2 of a component.
- a metallic adhesive Layer 3 of the MCrAlY type arranged.
- M in this alloy coins ⁇ tion typically for at least one metal selected from the group consisting of iron, cobalt and nickel.
- Y yttrium
- another element preferably a rare earth element, may be used in the alloy.
- a diffusion coating such as, for example, diffusion aluminides or platinum-modified diffusion aluminides as adhesion layer 3.
- the thermal barrier coating comprises a ceramic material, for example yttria-stabilized zirconia, or also gadolinium-stabilized zirconium oxide.
- the heat insulating layer 4 may also both yttria-stabilized zirconia and gadolinium oxide-stabilized zirconia aufwei ⁇ sen.
- a protective coating 5 is arranged on ⁇ , which consists of a layer in the embodiment of FIG.
- the protective coating 5 is in one embodiment a homogeneous layer of aluminum oxide, also referred to as corundum structure.
- the layer comprises chromium.
- the Ko ⁇ circular structure of an Al-Cr-O mixed crystal Depending on the chromium content of chromium is diffused from a high chromium layer in a low chromium-containing, with the corundum ⁇ structure of the Al-Cr-O mixed crystal is obtained.
- the example of a diffusion from the protective coating 5 into the thermal barrier coating 4 means that an (Al 0 , 7 Cr 0 , 3) 2O3 layer forms an (Al 0 , 99 Cr 0 , 01) 203 layer.
- This transformation involves a temperature-dependent color change of the layer from an original dark gray hue to a green one and then to a red one.
- corundum ruby
- the protective coating 5 consists of a first layer 5a and a second layer 5b.
- an adhesive layer 6 is arranged on the thermal barrier coating 4, on which in turn the protective coating 5 is arranged.
- the adhesive layer 6 is formed, for example, by evaporation of a zirconium yttrium target.
- the first layer 5a is arranged, which has a composition of Al-Zr-0 or Al-Zr (Cr) -0, ie that with this layer 5a between the thermal barrier coating 4 and the protective layer 5 by means of the method of RKFV material-adapted transition to the second layer 5b is produced, which has an Al-Zr-O corundum structure or an Al-Zr-Cr-O corundum structure.
- the layers are not strictly separated from one another, son ⁇ countries merge into one another, while having differences with regard to the concentration of accompanying metals such as zirconium and chromium, or other words, a gradient.
- the process of the RKFV is very well suited to allow the layers to merge into one another via a gradient.
- a thermally stressed structure is provided in a coating chamber.
- the thermally stressed structure is eg a blade of a gas turbine or a combustion chamber part.
- the coating chamber is in
- a vacuum chamber into which, however, oxygen can be introduced as a reactive gas to deposit an oxide on the sub ⁇ strate.
- a target as a material for the source to be formed ⁇ protective coating 5, wherein the target comprises at least aluminum.
- the target preferably chromium, and / or optionally other Ele ⁇ elements such as zirconium, titanium, hafnium and / or silicon.
- a controlled amount of oxygen is introduced into the coating chamber.
- a controlled amount of oxygen is introduced into the coating chamber.
- a spark is ignited, so that material is evaporated from the target.
- the evaporated target ⁇ elements react with the oxygen to form an oxide which deposits on the outside of the heat-insulating layer 4 of the thermally bean ⁇ cast-structure so that will prevent depositing layer is an oxide layer, ideally, an Al-Cr-O layer.
- the target eg for producing an Al-Cr-O-
- Layer an aluminum-chromium target acts as a cathode, and the wall of the coating chamber as an anode.
- a negative potential is applied to direct the ionized material vapor towards the substrate.
- the ver ⁇ evaporated material condenses on the surface of the heat-insulating layer and is deposited to form a layer that forms the protective coating.
- different targets are provided, from which material for the different layers is extracted.
- a zirconium-yttrium target is provided for the adhesion layer 6, an aluminum-chromium-zirconium target for the first layer 5a and for the second layer
- the concentration of the elements in the targets differs depending on the desired concentration in the layers to be formed or a gradient to be generated between the layers. Even within a layer, there may be a gradient.
- the prescribed be ⁇ traversing with the steps S2 to S4 is performed for each individual layer.
- the coating chamber can be ventilated between the application of the individual layers so that the target can be exchanged and subsequently the coating chamber can be pumped back to the desired vacuum.
- the coating system can be designed so that it contains all targets from the beginning of the coating process and these according to the desired layer sequence can be used without vacuum interruption.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physical Vapour Deposition (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016212874.4A DE102016212874A1 (en) | 2016-07-14 | 2016-07-14 | Protective coating for a thermally stressed structure |
PCT/EP2017/065493 WO2018010936A1 (en) | 2016-07-14 | 2017-06-23 | Protective coating for a thermally stressed structure |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3455387A1 true EP3455387A1 (en) | 2019-03-20 |
Family
ID=59315588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17737732.2A Pending EP3455387A1 (en) | 2016-07-14 | 2017-06-23 | Protective coating for a thermally stressed structure |
Country Status (9)
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US (1) | US11584984B2 (en) |
EP (1) | EP3455387A1 (en) |
JP (1) | JP7214620B2 (en) |
KR (1) | KR102355073B1 (en) |
CN (1) | CN109790616A (en) |
DE (1) | DE102016212874A1 (en) |
MX (1) | MX2019000540A (en) |
RU (1) | RU2748342C2 (en) |
WO (1) | WO2018010936A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113811638B (en) * | 2019-05-22 | 2024-03-05 | 合肥国轩高科动力能源有限公司 | Housing for a single cell with a heat insulation layer |
CN111534799B (en) * | 2020-05-29 | 2021-11-12 | 四川大学 | Oxidation-resistant and heat-insulating ceramic coating and preparation method thereof |
CA3221962A1 (en) * | 2021-07-13 | 2023-01-19 | Oerlikon Surface Solutions Ag, Pfaffikon | Overlay coating resistant to molten calcium-magnesium-alumino-silicate |
Family Cites Families (18)
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US5310607A (en) * | 1991-05-16 | 1994-05-10 | Balzers Aktiengesellschaft | Hard coating; a workpiece coated by such hard coating and a method of coating such workpiece by such hard coating |
KR100354411B1 (en) * | 1994-10-14 | 2002-11-18 | 지멘스 악티엔게젤샤프트 | Protective layer for protecting parts against corrosion, oxidation and excessive thermal stresses, as well as process for producing the same |
CA2327031C (en) * | 1999-11-29 | 2007-07-03 | Vladimir Gorokhovsky | Composite vapour deposited coatings and process therefor |
US7300559B2 (en) * | 2000-04-10 | 2007-11-27 | G & H Technologies Llc | Filtered cathodic arc deposition method and apparatus |
EP1553210B1 (en) * | 2002-08-08 | 2014-05-28 | Kabushiki Kaisha Kobe Seiko Sho | PROCESS FOR PRODUCING ALUMINA COATING COMPOSED MAINLY OF a-TYPE CRYSTAL STRUCTURE |
DE502005003972D1 (en) * | 2005-02-18 | 2008-06-19 | Siemens Ag | MCrAIX alloy, MCrAIX alloy protective layer and method of manufacture |
CA2573585A1 (en) | 2006-02-16 | 2007-08-16 | Sulzer Metco Coatings B.V. | A component, an apparatus and a method for the manufacture of a layer system |
US7476450B2 (en) * | 2006-03-24 | 2009-01-13 | United Technologies Corporation | Coating suitable for use as a bondcoat in a thermal barrier coating system |
JP4959213B2 (en) | 2006-03-31 | 2012-06-20 | 三菱重工業株式会社 | Thermal barrier coating member and manufacturing method thereof, thermal barrier coating material, gas turbine, and sintered body |
AU2007306494B2 (en) | 2006-10-10 | 2012-05-31 | Oerlikon Trading Ag, Truebbach | Layer system having at least one mixed crystal layer of a polyoxide |
CN100523241C (en) * | 2008-04-08 | 2009-08-05 | 北京航空航天大学 | Pyrogenic oxidation resistant nickel-aluminium-dysprosium coat bond material and preparation of hot screening coating |
EP2166128B1 (en) * | 2008-09-19 | 2011-11-09 | Oerlikon Trading AG, Trübbach | Method for producing metal oxide coatings by means of spark nebulisation |
DE102008026358A1 (en) * | 2008-05-31 | 2009-12-03 | Walter Ag | Tool with metal oxide coating |
RU2409701C2 (en) * | 2009-04-09 | 2011-01-20 | Российская Федерация, от имени которой выступает государственный заказчик - Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Procedure for application of ceramic coating |
US20110151132A1 (en) * | 2009-12-21 | 2011-06-23 | Bangalore Nagaraj | Methods for Coating Articles Exposed to Hot and Harsh Environments |
EP2363509A1 (en) | 2010-02-28 | 2011-09-07 | Oerlikon Trading AG, Trübbach | Synthesis of metal oxides by reactive cathodic arc evaporation |
JP2012132042A (en) | 2010-12-20 | 2012-07-12 | Hitachi Tool Engineering Ltd | Hard-member coated metal mold and its manufacturing method |
DE102013217627A1 (en) * | 2013-09-04 | 2015-03-05 | MTU Aero Engines AG | Thermal insulation layer system with corrosion and erosion protection |
-
2016
- 2016-07-14 DE DE102016212874.4A patent/DE102016212874A1/en not_active Withdrawn
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2017
- 2017-06-23 CN CN201780043503.9A patent/CN109790616A/en active Pending
- 2017-06-23 WO PCT/EP2017/065493 patent/WO2018010936A1/en unknown
- 2017-06-23 KR KR1020197001268A patent/KR102355073B1/en active IP Right Grant
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- 2017-06-23 US US16/316,164 patent/US11584984B2/en active Active
- 2017-06-23 MX MX2019000540A patent/MX2019000540A/en unknown
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Also Published As
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CN109790616A (en) | 2019-05-21 |
US11584984B2 (en) | 2023-02-21 |
JP7214620B2 (en) | 2023-01-30 |
KR20190038801A (en) | 2019-04-09 |
KR102355073B1 (en) | 2022-01-24 |
MX2019000540A (en) | 2019-09-19 |
RU2019103994A3 (en) | 2020-10-30 |
DE102016212874A1 (en) | 2018-01-18 |
RU2748342C2 (en) | 2021-05-24 |
WO2018010936A1 (en) | 2018-01-18 |
JP2019527768A (en) | 2019-10-03 |
RU2019103994A (en) | 2020-08-14 |
US20210214838A1 (en) | 2021-07-15 |
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Owner name: OERLIKON SURFACE SOLUTIONS AG, PFAEFFIKON Owner name: SIEMENS ENERGY GLOBAL GMBH & CO. KG |