EP2381006A1 - Système de couche pour un composant de turbine - Google Patents

Système de couche pour un composant de turbine Download PDF

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Publication number
EP2381006A1
EP2381006A1 EP10004294A EP10004294A EP2381006A1 EP 2381006 A1 EP2381006 A1 EP 2381006A1 EP 10004294 A EP10004294 A EP 10004294A EP 10004294 A EP10004294 A EP 10004294A EP 2381006 A1 EP2381006 A1 EP 2381006A1
Authority
EP
European Patent Office
Prior art keywords
layer
substrate
barrier coating
thermal barrier
erosion
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.)
Withdrawn
Application number
EP10004294A
Other languages
German (de)
English (en)
Inventor
Jochen Dr. Barnikel
Friedhelm Schmitz
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP10004294A priority Critical patent/EP2381006A1/fr
Publication of EP2381006A1 publication Critical patent/EP2381006A1/fr
Withdrawn legal-status Critical Current

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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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • C23C4/11—Oxides
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying

Definitions

  • the invention relates to a method for producing a turbine component, in particular steam turbine component, with a substrate to which a thermal barrier coating is tied and an erosion layer is applied to the thermal barrier coating by means of atmospheric plasma spraying.
  • the steam parameters can be more than 600 ° C, which leads to increased thermal demands on the materials. Therefore, those materials must be used which have a high creep strength. However, such materials usually have no ideal property in terms of oxidation resistance. The oxidation resistance is usually not sufficient for the extreme steam parameters.
  • Suitable coatings used in extreme thermal stresses are aluminum-containing coatings. Such coatings have the advantage that when applying and curing the layer by diffusion of aluminum in the base material, a good connection to the material to be protected is achieved. In addition, an AL 2 O 3 layer is formed which protects the material against oxidation.
  • austenitic steels reach their limits due to unfavorable physical properties, such as high coefficient of thermal expansion or low thermal conductivity, various variants of high-strength, ferritic martensitic steels with chromium contents of 9% by weight to 12% by weight are developed.
  • thermal barrier coatings Another technical challenge is the application of the thermal barrier coatings to a turbine component.
  • One solution to this technical challenge is the use of an adhesive layer between the base material and the thermal barrier coating.
  • This adhesive layer which is also referred to as bond coating, causes not only an improved adhesion of the ceramic thermal barrier coating but also a protection of the base material against oxidation and corrosion.
  • a further protective layer which may also be referred to as a topcoat.
  • Suitable materials for use as adhesive layer and topcoating include Ni / Cr80 / 20 and MCrAlY.
  • the use of the above-mentioned adhesive layers or top coatings is good on base materials based on nickel-based alloy.
  • the problem here is the use of the aforementioned adhesive layers and top coatings against ferritic base materials (1 wt .-% to 2.5 wt .-% chromium or 9 wt .-% to 12 wt .-% chromium - steels) and compared a ZrO 2- litämm layer, since the aforementioned adhesive layers have significantly higher thermal expansion coefficients. This leads to higher stresses or strains compared with the base material as well as with respect to the thermal barrier coating, which can lead to cracking.
  • the object of the invention is to provide a layer system which shows a low tendency to cracking.
  • the erosion protective layer is applied as a top coat over the thermal barrier coating and has a coefficient of linear expansion ⁇ Top , which is matched to the thermal expansion coefficient ⁇ WDS of the thermal barrier coating.
  • the erosion protection layer applied by atmospheric plasma spraying is such that it has a proportion of zirconium dioxide in a proportion of up to 50 wt .-%.
  • the erosion control layer has a proportion of aluminum oxide in a proportion of up to 50 wt .-%.
  • a layer system comprising a substrate, a thermal barrier coating disposed on the substrate and an erosion control layer disposed on the thermal barrier coating, wherein the erosion control layer comprises a metallic layer in which zirconium dioxide (ZrO 2 ) fractions are contained.
  • the selective selection of the materials for the individual layers leads to an alignment of the coefficients of linear expansion of the individual layers, which leads to the effect of reducing stresses and thereby preventing cracking.
  • the metallic layer is a ferritic layer.
  • the erosion layer is formed in an alternative embodiment on a NiCoCrAlY base with a content of zirconia or alumina. This selection of suitable materials also leads to a reduced crack formation in the layer system.
  • the figure shows a schematically illustrated layer system.
  • an adhesive layer 2 which is also referred to as a bond coating, applied by a suitable method.
  • a thermal barrier coating 3 applied by another suitable method.
  • an erosion protection layer 4 which can also be referred to as top-coating.
  • the turbine component which is in particular a steam turbine component and z. B. may be part of an inner housing or a turbine blade comprises a ferritic base material 1.
  • a thermal insulation layer 3 is connected.
  • This thermal barrier coating 3 is, for example, a ZrO 2 thermal barrier coating or a partially stabilized zirconium oxide of yttrium. Other thermal barrier coatings 3 are conceivable.
  • an adhesive layer 2 which is also referred to as a bond coat applied.
  • the adhesive layer 2 is applied to the ferritic base material 1 by an atmospheric plasma spraying process.
  • the erosion protection layer 4 is likewise arranged on the thermal barrier coating 3 by means of an atmospheric plasma spraying process, the powder used having the following composition: element Concentration in% by weight preferably CR 22-26 23 - 24 al 5-8 6 - 7 Rare earth 0,5 - 2 Fe Base (rest)
  • the applied by atmospheric plasma spray erosion control layer 4 has a content of zirconium dioxide in a proportion of up to 50 wt .-% on.
  • the erosion control layer 4 applied by atmospheric plasma spraying may comprise a proportion of aluminum oxide in an amount of up to 50% by weight.
  • the erosion protection layer 4 may be formed in an alternative embodiment on a nickel-cobalt-chromium-alumina-based with a content of zirconia or alumina.
  • the erosion protection layer 4 has a coefficient of linear expansion ⁇ TOP , which is essentially the same as the coefficient of linear expansion ⁇ WDS of the thermal barrier coating.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
EP10004294A 2010-04-22 2010-04-22 Système de couche pour un composant de turbine Withdrawn EP2381006A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10004294A EP2381006A1 (fr) 2010-04-22 2010-04-22 Système de couche pour un composant de turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10004294A EP2381006A1 (fr) 2010-04-22 2010-04-22 Système de couche pour un composant de turbine

Publications (1)

Publication Number Publication Date
EP2381006A1 true EP2381006A1 (fr) 2011-10-26

Family

ID=42352691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10004294A Withdrawn EP2381006A1 (fr) 2010-04-22 2010-04-22 Système de couche pour un composant de turbine

Country Status (1)

Country Link
EP (1) EP2381006A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091548A (en) * 1959-12-15 1963-05-28 Union Carbide Corp High temperature coatings
JPH0320451A (ja) * 1989-06-16 1991-01-29 Hitachi Ltd セラミック被覆タービン動翼
WO1994008069A1 (fr) * 1992-09-30 1994-04-14 United Technologies Corporation Materiau de revetement en ceramique composite
WO2006076000A2 (fr) * 2004-04-15 2006-07-20 The Board Of Governors For Higher Education, State Of Rhode Island And Providence Plantations Revetements barrieres thermiques utilisant des nanocomposites intermediaires tce
EP1970461A1 (fr) * 2007-03-14 2008-09-17 Siemens Aktiengesellschaft Pièce de turbine dotée d'une couche d'isolation thermique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091548A (en) * 1959-12-15 1963-05-28 Union Carbide Corp High temperature coatings
JPH0320451A (ja) * 1989-06-16 1991-01-29 Hitachi Ltd セラミック被覆タービン動翼
WO1994008069A1 (fr) * 1992-09-30 1994-04-14 United Technologies Corporation Materiau de revetement en ceramique composite
WO2006076000A2 (fr) * 2004-04-15 2006-07-20 The Board Of Governors For Higher Education, State Of Rhode Island And Providence Plantations Revetements barrieres thermiques utilisant des nanocomposites intermediaires tce
EP1970461A1 (fr) * 2007-03-14 2008-09-17 Siemens Aktiengesellschaft Pièce de turbine dotée d'une couche d'isolation thermique

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