EP2551369B1 - Procédé de fabrication d'une couche de diffusion limitée dans l'espace et réacteur associé - Google Patents

Procédé de fabrication d'une couche de diffusion limitée dans l'espace et réacteur associé Download PDF

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Publication number
EP2551369B1
EP2551369B1 EP12005135.4A EP12005135A EP2551369B1 EP 2551369 B1 EP2551369 B1 EP 2551369B1 EP 12005135 A EP12005135 A EP 12005135A EP 2551369 B1 EP2551369 B1 EP 2551369B1
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EP
European Patent Office
Prior art keywords
component
protective gas
diffusion layer
reactor
gas stream
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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.)
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Application number
EP12005135.4A
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German (de)
English (en)
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EP2551369A1 (fr
Inventor
Heinrich Walter
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.)
MTU Aero Engines AG
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MTU Aero Engines AG
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Publication of EP2551369A1 publication Critical patent/EP2551369A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C21/00—Accessories or implements for use in connection with applying liquids or other fluent materials to surfaces, not provided for in groups B05C1/00 - B05C19/00
    • B05C21/005—Masking devices
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/04—Diffusion into selected surface areas, e.g. using masks
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
    • C23C10/32—Chromising
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/38—Chromising
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/38—Chromising
    • C23C10/40—Chromising of ferrous surfaces
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/44—Siliconising
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/44—Siliconising
    • C23C10/46—Siliconising of ferrous surfaces
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/48—Aluminising
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/48—Aluminising
    • C23C10/50—Aluminising of ferrous surfaces

Definitions

  • the present invention relates to a method for producing a locally limited diffusion layer on a metallic component and to a corresponding reactor for this purpose.
  • Diffusion layers in which metals such as aluminum, silicon or chromium are diffused into the surface area of a metallic component such as a turbine blade, are known for forming protective layers.
  • metals such as aluminum, silicon or chromium are diffused into the surface area of a metallic component such as a turbine blade
  • aluminizing or aluminizing, siliconizing and chromizing that component sections which are not to be provided with a corresponding diffusion layer can only be protected with difficulty from the undesired formation of a diffusion layer.
  • Proposals for measures to protect the component surface against the formation of diffusion layers are for example in the DE 43 44 061 C1 and the DE 103 47 363 A1 described.
  • the DE 43 44 061 C1 suggests providing the component with two layers in the areas in which no aluminizing or chromating should take place, namely a first layer, which is designed as a separating layer and a second layer, which is designed as a getter layer for reaction gases.
  • the first layer can be a slip cast layer made of oxide-ceramic particles with a low-carbon and holgenid-free binder
  • the second layer can be a metal layer or a metallic slip cast layer.
  • the invention is based on the knowledge that component areas which should not be provided with a diffusion layer can be protected by means of a protective gas jet, provided that a sufficient amount of protective gas or a sufficient flow of protective gas is provided with a suitable protective gas jet pressure.
  • a protective gas jet provides a sufficient amount of protective gas or a sufficient flow of protective gas.
  • This is for example by using a nozzle device for forming a directed protective gas jet is possible, which can be aimed specifically at the areas of the component not to be provided with the diffusion layer, so that the transport processes required for the formation of the diffusion layer can be interrupted there via halogen compounds.
  • a cover is provided on the component, which between the component surface and the Cover forms a cavity or channel so that the corresponding protective gas jet can be guided through this cavity or the channel in order to achieve a better concentration of the protective gas jet with high protective gas pressure or strong protective gas flow on the component surface to be protected.
  • a corresponding adapter can then be provided in the reactor, which has a connection to the cavities or channels of the component as well as to a protective gas feed line of the reactor
  • the present invention can be used in connection with a wide variety of diffusion layers, for example for the formation of aluminum-rich layers or aluminum layers, PtAl, CrAl, MCrAlY layers or combinations thereof. Silicon and / or chromium layers are also conceivable.
  • the present invention can be used both in the production of diffusion layers in which a powder pack is used as a dispenser pack to provide the material to be diffused, and in corresponding processes in which the coating material, for example, in the form of a paste by spraying, brushing, dipping and the like is applied directly to the substrate surface.
  • the protective gas for protecting areas not to be provided with a diffusion layer can be the same protective gas that is used in a corresponding reactor to form an inert or reducing atmosphere.
  • inert gases such as noble gases, e.g. B. argon, or hydrogen and combinations thereof into consideration, hydrogen on the basis of its reducing effect for avoiding oxides is advantageous.
  • the present invention can be used in the aluminizing of turbine blades with internal cooling channels, in which an aluminizing of the cooling channels is avoided shall be.
  • the protective gas is introduced into the cooling channels by means of an adapter during the manufacturing process of the diffusion layer, in order to protect the cooling channels from aluminizing.
  • the attached figure shows in a purely schematic representation a sectional view through a reactor according to the invention with the component to be processed, the dispenser packs and the protective gas duct.
  • the figure shows an embodiment of a reactor 1 according to the invention which is suitable for carrying out the method according to the invention.
  • the reactor 1 has a reactor interior 10 which is delimited by a reactor vessel 11.
  • the component 2 to be provided with the diffusion layer, in the present case a turbine blade 2 is arranged in the reactor interior 10.
  • a plurality of dispenser packs 3 in the form of powder packs, which comprise a metal powder or a powder of a metal-rich compound for providing the metal to be diffused, are arranged around the turbine blade 2.
  • the powder packs 3 also have a neutral filler material, e.g. B. an oxide such as alumina, which prevents agglomeration of the fine metal powder.
  • the powder pack 3 contains a so-called activator, for example a halogen compound such as AlCl 3 or AlF 3 , which serves as a chemical transport medium for the metal to be diffused.
  • the reactor has a heating device, not shown, with which it is possible to heat the reactor interior 10 and thus the turbine blade 2 and the powder packs 3 to a temperature at which the diffusion processes for the formation of a diffusion layer can take place.
  • the reactor vessel 11 has a double bottom 7 which is connected to a gas supply line 6 so that protective gas, e.g. B. noble gases, such as argon, and / or other protective gases, such as hydrogen, can be introduced into the reactor vessel 11 via the double bottom 7.
  • protective gas e.g. B. noble gases, such as argon
  • protective gases such as hydrogen
  • the double reactor base 7 there is an outlet 8 to which an adapter 5 is connected, which in turn is connected to cooling channels and cavities 4 of the turbine blade 2, so that protective gas, which is introduced via the protective gas supply line 6 and the double base 7, via the adapter 5 can be introduced into the cooling channels and other cavities 4 of the turbine blade 2 that are not to be provided with the diffusion layer.
  • an area of the component 2 that is not to be provided with a diffusion layer is covered with at least one cover (in Fig.
  • the heating is switched off so that the turbine blade 2 cools and the inflow of protective gas is switched off.
  • the turbine blade 2, which is provided with a partial diffusion layer, can be removed without further cleaning measures, such as, for example, removing cover powder or the like. Complex processes for removing covering means can thus be dispensed with, which increases the efficiency of the method considerably.

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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)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Powder Metallurgy (AREA)

Claims (9)

  1. Procédé de fabrication d'une couche de diffusion limitée dans l'espace sur un composant métallique, comprenant les étapes suivantes :
    disposition du composant (2) et d'au moins un emballage de distribution (3) comprenant le matériau à diffuser dans un réacteur (1), fourniture d'au moins un jet de gaz de protection qui circule autour de l'au moins une zone du composant (2) qui ne doit pas être pourvue de couche de diffusion, chauffage du composant (2) et de l'emballage de distribution (3) à une température à laquelle des processus de diffusion peuvent avoir lieu pour former la couche de diffusion, et maintien de la température jusqu'à ce que la couche de diffusion soit achevée, caractérisé en ce que le composant (2) est recouvert d'au moins un couvercle dans la zone du composant (2) qui ne doit pas être pourvue de couche de diffusion, au moins un canal, à travers lequel le jet de gaz de protection est guidé, étant formé entre le couvercle et le composant (2).
  2. Procédé selon la revendication 1, caractérisé en ce que la fabrication de la couche de diffusion est un processus d'aluminisation, de siliconage et/ou de chromatation utilisant un emballage de distribution (3) contenant de l'Al, du Si et/ou du Cr.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'emballage de distribution (3) est fourni sous la forme d'un emballage de poudre ou d'une pâte appliquée sur le composant (2).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le composant (2) et l'emballage de distribution (3) sont disposés dans le réacteur sous gaz de protection.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le jet de gaz de protection est conduit dans des cavités (4) et/ou des canaux du composant (2) qui ne doivent pas être pourvus de couche de diffusion.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le composant (2) est une aube de turbine.
  7. Réacteur pour la fabrication d'une couche de diffusion limitée dans l'espace sur un composant métallique (2), en particulier par un procédé selon l'une des revendications précédentes, le réacteur comportant une chambre de réacteur (10) destinée à recevoir le composant (2) à traiter et au moins un emballage de distribution (3) qui comprend le matériau à diffuser, et au moins une conduite d'alimentation (6, 7) pour un gaz de protection, caractérisé en ce qu'un adaptateur (5) est prévu pour la liaison de la conduite d'alimentation en gaz de protection à un couvercle disposé sur le composant, lequel adaptateur permet de régler au moins un jet de gaz de protection sur l'au moins une zone du composant (2) qui ne doit pas être pourvue de couche de diffusion, au moins un canal, à travers lequel le jet de gaz de protection est guidé, étant formé entre le couvercle et le composant (2).
  8. Réacteur selon la revendication 7, caractérisé en ce qu'un dispositif de buse est prévu pour former un jet de gaz de protection orienté.
  9. Réacteur selon l'une des revendications 7 ou 8, caractérisé en ce qu'un adaptateur (5) est prévu pour la liaison de la conduite d'alimentation en gaz de protection (6, 7) à des cavités et/ou des canaux (4) du composant (2).
EP12005135.4A 2011-07-28 2012-07-12 Procédé de fabrication d'une couche de diffusion limitée dans l'espace et réacteur associé Active EP2551369B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011108771A DE102011108771B3 (de) 2011-07-28 2011-07-28 Verfahren zur Herstellung einer lokal begrenzten Diffusionsschicht und Reaktor hierfür

Publications (2)

Publication Number Publication Date
EP2551369A1 EP2551369A1 (fr) 2013-01-30
EP2551369B1 true EP2551369B1 (fr) 2020-09-02

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Family Applications (1)

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EP12005135.4A Active EP2551369B1 (fr) 2011-07-28 2012-07-12 Procédé de fabrication d'une couche de diffusion limitée dans l'espace et réacteur associé

Country Status (3)

Country Link
US (1) US20130189429A1 (fr)
EP (1) EP2551369B1 (fr)
DE (1) DE102011108771B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213555A1 (de) * 2015-07-20 2017-03-09 MTU Aero Engines AG Dichtrippenpanzerung und Verfahren zur Herstellung derselben
US20190194799A1 (en) 2017-12-22 2019-06-27 United Technologies Corporation Line-of-sight coating fixture and apparatus

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1076111A2 (fr) * 1999-08-11 2001-02-14 General Electric Company Dispositif et procédé pour revêtir sélectivement les surfaces internes et externes d'une ailette
WO2003064718A2 (fr) * 2002-01-29 2003-08-07 Sulzer Metco (Us) Inc. Procede de revetement selectif d'une partie d'un substrat au moyen d'une substance contenue dans un gaz
EP2551370A1 (fr) * 2011-07-25 2013-01-30 United Technologies Corporation Procédé de revêtement par diffusion sans masquage

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US4132816A (en) * 1976-02-25 1979-01-02 United Technologies Corporation Gas phase deposition of aluminum using a complex aluminum halide of an alkali metal or an alkaline earth metal as an activator
US4402992A (en) * 1981-12-07 1983-09-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Covering solid, film cooled surfaces with a duplex thermal barrier coating
DE4344061C1 (de) * 1993-12-23 1995-03-30 Mtu Muenchen Gmbh Bauteil mit Schutzanordnung gegen Alitieren oder Chromieren beim Gasdiffusionsbeschichten und Verfahren zu seiner Herstellung
US5928725A (en) * 1997-07-18 1999-07-27 Chromalloy Gas Turbine Corporation Method and apparatus for gas phase coating complex internal surfaces of hollow articles
WO1999023273A1 (fr) * 1997-11-03 1999-05-14 Siemens Aktiengesellschaft Procede d'application de revetement et dispositif
US6183811B1 (en) * 1998-12-15 2001-02-06 General Electric Company Method of repairing turbine airfoils
EP1275747B1 (fr) * 2001-07-11 2011-02-23 Alstom Technology Ltd Procédé de revêtement d' un composant résistant à des températures élevées avec un revêtement de protection thermique et composant résistant à des températures élevées
DE10347363A1 (de) * 2003-10-11 2005-05-12 Mtu Aero Engines Gmbh Verfahren zur lokalen Alitierung, Silizierung oder Chromierung von metallischen Bauteilen
US7632541B2 (en) * 2006-03-13 2009-12-15 General Electric Company Method and device to prevent coating a dovetail of a turbine airfoil
US7927656B2 (en) * 2006-08-31 2011-04-19 General Electric Company Method and apparatus for controlling diffusion coating of internal passages

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1076111A2 (fr) * 1999-08-11 2001-02-14 General Electric Company Dispositif et procédé pour revêtir sélectivement les surfaces internes et externes d'une ailette
WO2003064718A2 (fr) * 2002-01-29 2003-08-07 Sulzer Metco (Us) Inc. Procede de revetement selectif d'une partie d'un substrat au moyen d'une substance contenue dans un gaz
EP2551370A1 (fr) * 2011-07-25 2013-01-30 United Technologies Corporation Procédé de revêtement par diffusion sans masquage

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DE102011108771B3 (de) 2012-09-27
EP2551369A1 (fr) 2013-01-30
US20130189429A1 (en) 2013-07-25

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