EP3892750A1 - Oberflächenbehandlung vor dem aufbringen von tbc - Google Patents

Oberflächenbehandlung vor dem aufbringen von tbc Download PDF

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Publication number
EP3892750A1
EP3892750A1 EP20168495.8A EP20168495A EP3892750A1 EP 3892750 A1 EP3892750 A1 EP 3892750A1 EP 20168495 A EP20168495 A EP 20168495A EP 3892750 A1 EP3892750 A1 EP 3892750A1
Authority
EP
European Patent Office
Prior art keywords
carried out
shot
grit blasting
coating
tbc
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Withdrawn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
EP20168495.8A
Other languages
English (en)
French (fr)
Inventor
Xin-hai LI
Mohit Gupta
Nicolaie Markocsan
Snezana Djordjevic
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 EP20168495.8A priority Critical patent/EP3892750A1/de
Priority to PCT/EP2021/058304 priority patent/WO2021204596A1/en
Publication of EP3892750A1 publication Critical patent/EP3892750A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • 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
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • 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
    • F01D5/005—Repairing methods or devices
    • 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
    • F01D5/284—Selection of ceramic materials
    • 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
    • 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 surface treatment of a substrate or metallic coating before applying a ceramic coating on top.
  • the APS TBC's contain a laminar structure and are much less strain tolerant as compared to the ones with a columnar structure and therefore have a short cyclic life.
  • the EB-PVD TBC's contain a columnar structure and therefore a good cyclic life. However, they have some disadvantages as high thermal conductivity, thickness is limited to maximum 350 ⁇ m, high investment costs, and component size limitation since using vacuum chamber is necessary.
  • TBCs with a long life and a low conductivity are needed to solve the problem.
  • SPS suspension plasma spraying
  • the problem is solved by a method of a surface treatment of claim 1, by a substrate of claim 10 and by a method to apply a ceramic coating according to claim 11.
  • the three figures show the surface morphology and the resulting SPS TBC.
  • This invention is to introduce some key surface treatments on the metallic bond coat or a substrate, like especially MCrAlY bond coats prior to a SPS top coat application.
  • the inventive surface treatment includes first a shot peening and then a light grit blasting.
  • Cleaning steps can preferably be performed before, between and finally.
  • the shot peening should be carried out with a shot size of 0,2 mm -0,5 mm in diameter of shot media, preferably made of cast steels, metal cut wires, glass beans, or ceramic beans, preferably a pressure of 0,5-5 bars, preferably a surface coverage 100% - 400%.
  • the following grit blasting should be carried out preferably with Alumina grit of 80-270 mesh, preferably a pressure of 0,5-5 bars, preferably nozzle diameter 5 mm - 20 mm, preferably at an angle of 30° - 80° to the surface.
  • the unique surface roughness created by this procedure results in formation of thin columnar topcoat microstructure.
  • SPS TBCs have a lower thermal conductivity and/or longer life, especially cyclic life than that of the currently used APS and EBPVD TBC. These advantages allow an increase in lifetime of gas turbine components and the turbine efficiency.
  • Figure 1 shows the morphology of an as-spayed surface 4' of a metallic bond coat on substrate 4 on the left and on the right side the columnar microstructure of a SPS TBC 7' as in the state of the art.
  • Figure 2 shows the morphology of a surface 4" of a metallic bond coat on a substrate 4 on the left, which was shot peened (starting from Figure 1 ) creating a smoother bond coat surface than the as-sprayed bond coat 4' and on the right side the columnar microstructure of a SPS TBC 7".
  • TBC 7 contains smaller columns and its outer surface is smoother than the SPS TBC 7' in figure 1 .
  • Figure 3 shows the inventive morphology of a surface 4"' of a metallic bond coat on a substrate 4 on the left, which was shot peened according to figure 2 and finally grit blasting, starting from figure 2 and on the right side the resulting microstructure of a SPS TBC 7"'.
  • the bond coat surface 4"' is smooth but contains small and frequent peaks so called micro-roughness.
  • This inventive surface morphology leads to the SPS TBC 7"' in figure 3 containing much smaller or thinner columns with a high column density as compared to the SPS TBC 7" in figure 2 .
  • the SPS TBC 7"' surface is as least as smooth as that 7" in figure 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Ceramic Engineering (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP20168495.8A 2020-04-07 2020-04-07 Oberflächenbehandlung vor dem aufbringen von tbc Withdrawn EP3892750A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20168495.8A EP3892750A1 (de) 2020-04-07 2020-04-07 Oberflächenbehandlung vor dem aufbringen von tbc
PCT/EP2021/058304 WO2021204596A1 (en) 2020-04-07 2021-03-30 Surface treatment before applying tbc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20168495.8A EP3892750A1 (de) 2020-04-07 2020-04-07 Oberflächenbehandlung vor dem aufbringen von tbc

Publications (1)

Publication Number Publication Date
EP3892750A1 true EP3892750A1 (de) 2021-10-13

Family

ID=70227867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20168495.8A Withdrawn EP3892750A1 (de) 2020-04-07 2020-04-07 Oberflächenbehandlung vor dem aufbringen von tbc

Country Status (2)

Country Link
EP (1) EP3892750A1 (de)
WO (1) WO2021204596A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0937787A1 (de) * 1998-02-19 1999-08-25 United Technologies Corporation Verfahren zur Beschichtung eines thermischen Sperrschichtsystems, sowie beschichteter Gegenstand
EP1013795A1 (de) * 1998-12-15 2000-06-28 United Technologies Corporation Verfahren zum Anbringen wärmedämmender Beschichtungen mit verbesserter Haltbarkeit
EP1217089A2 (de) * 2000-12-22 2002-06-26 United Technologies Corporation Verbesserte Vorbereitung einer Oberfläche zum Auftragen von keramischen Beschichtungen
US20030041927A1 (en) * 2001-08-31 2003-03-06 Irene Spitsberg Fabrication of an article having a protective coating with a flattened, pre-oxidized protective-coating surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0937787A1 (de) * 1998-02-19 1999-08-25 United Technologies Corporation Verfahren zur Beschichtung eines thermischen Sperrschichtsystems, sowie beschichteter Gegenstand
EP1013795A1 (de) * 1998-12-15 2000-06-28 United Technologies Corporation Verfahren zum Anbringen wärmedämmender Beschichtungen mit verbesserter Haltbarkeit
EP1217089A2 (de) * 2000-12-22 2002-06-26 United Technologies Corporation Verbesserte Vorbereitung einer Oberfläche zum Auftragen von keramischen Beschichtungen
US20030041927A1 (en) * 2001-08-31 2003-03-06 Irene Spitsberg Fabrication of an article having a protective coating with a flattened, pre-oxidized protective-coating surface

Also Published As

Publication number Publication date
WO2021204596A1 (en) 2021-10-14

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