EP2772567A1 - Procédé de fabrication d'une couche d'isolation thermique pour composants et couche d'isolation thermique - Google Patents

Procédé de fabrication d'une couche d'isolation thermique pour composants et couche d'isolation thermique Download PDF

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Publication number
EP2772567A1
EP2772567A1 EP13157238.0A EP13157238A EP2772567A1 EP 2772567 A1 EP2772567 A1 EP 2772567A1 EP 13157238 A EP13157238 A EP 13157238A EP 2772567 A1 EP2772567 A1 EP 2772567A1
Authority
EP
European Patent Office
Prior art keywords
thermal barrier
barrier coating
barrier layer
depth
focus
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Withdrawn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
EP13157238.0A
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German (de)
English (en)
Inventor
Bernd Burbaum
Britta Laux
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 EP13157238.0A priority Critical patent/EP2772567A1/fr
Publication of EP2772567A1 publication Critical patent/EP2772567A1/fr
Withdrawn legal-status Critical Current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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate

Definitions

  • the invention relates to a method for producing a thermal insulation layer for components, in particular for high-temperature loaded components, comprising a thermal barrier layer surface and a thermal insulation layer inside, wherein at least a first laser light source by means of at least one first focusing at least generates a first focus in at least a first depth of the thermal barrier coating. Furthermore, the invention relates to a thermal barrier coating.
  • TBC thermal barrier coating
  • e.g. Sand Ingress of foreign matter such as e.g. Sand, however, causes the thermal barrier coating to flake off due to its porous surface. Foreign substances can also infiltrate the thermal barrier coating in liquid form, subsequently crystallize and cause the coating to flake off. This can significantly reduce the life of the component. This is the case in particular when the thermal barrier coating is a ceramic, brittle layer.
  • the thermal barrier coating by using at least two foci with different depths in the thermal barrier coating, it is possible to couple more light output into the interior of the thermal barrier coating and thus to produce a larger volume of remelt bath with different temperatures.
  • the at least two foci produce a V-shaped remelt bath, with high temperatures and remelting in the interior of the thermal barrier coating; and low temperatures in the edge region of the remelt bath. This leads to a reduction of the temperature gradient around the remelt bath (melting zone). This results in a reduction of the hot cracking tendency.
  • the melt solidifies from the inside of the thermal barrier coating to the outside. Thus Ausgaszonen be prevented and led inclusions to the thermal barrier coating surface, resulting in a reduced pore formation.
  • the actual remelting process takes place inside the thermal barrier coating while the thermal barrier coating surface is merely preheated becomes.
  • the thermal barrier layer surface is compressed, so that liquid foreign substances no longer penetrate into the thermal barrier coating; crystallize there and thus cause a flaking of the thermal barrier coating.
  • the life of the coating and the component, such as a turbine blade can be extended.
  • the second object is achieved by specifying a thermal barrier coating for components subjected to high temperatures, which has a thermal barrier coating surface and a thermal barrier coating interior according to the abovementioned method.
  • a remelt bath in particular a V-shaped remelt bath, causes solidification of the melt from the interior of the heat insulation layer to the outside. This prevents outgassing and shrinkage zones. Pore formation can thus be avoided.
  • the thermal barrier coating according to the invention has a seal, in particular on the surface.
  • the at least two focusing devices are designed as a bifocal lens.
  • the application of a bifocal lens produces two concentric circular intensity distributions in the thermal barrier coating. Thermal stresses can thus be reduced during the remelting process and cracking during the remelting process can be prevented.
  • the thermal barrier coating is a ceramic layer. This is particularly well suited for high-temperature loaded components, eg blades or heat shields.
  • FIG. 1 shows a thermal barrier coating 100 and a laser 1, from which a light beam 2 emanates.
  • the bifocal lens 3 consists of a first and a second lens.
  • the first lens may be a disk-shaped lens 5 and the second lens may be an annular lens 4, the annular lens 4 and disk-shaped lens 5 then detecting different parts of the light beam 2.
  • the annular lens 4 and the disc-shaped lens 5 are arranged concentrically with each other, ie they have the same center (not shown).
  • the annular lens 4 and the disc-shaped lens 5 act as converging lenses, but have different focal lengths.
  • the annular lens 4 and disc-shaped lens 5 split the light beam 2 into two light beams.
  • the annular lens 4 detects the outer peripheral zones of the light beam 2 and the disc-shaped lens 5 forms an inner core of the light beam 2.
  • the light beam through the disc-shaped central lens 5 can therefore also be regarded as the central beam 50, the light beam through the annular lens 4 can therefore also be regarded as a ring beam 40.
  • the fixed by the disc-shaped lens 5 central beam 50 has a lower convergence angle ⁇ than the fixed by the annular lens 4 ring beam 40 with a convergence angle ⁇ .
  • the V-shaped remelt bath formed by the bifocal lens 3 solidifies from the top of the V-shape, that is, from the interior of the thermal barrier coating 100 to the thermal barrier coating surface, resulting in reduced pore formation. Inclusions and outgassing zones are led to the thermal barrier layer surface and can escape there, resulting in reduced pore formation.
  • the actual remelting therefore takes place inside the thermal barrier coating, while the thermal barrier coating surface is merely preheated. In particular, in the boundary layer between the ring beam 40 and the adjacent area in the thermal barrier coating 100, no remelting takes place.
  • the thermal barrier coating surface is densified or sealed in such a way that foreign substances no longer penetrate through the porous thermal barrier coating surface into the porous thermal barrier coating can; a spalling of the thermal barrier coating is thus avoided.
  • the life of the coating and the component, such as a turbine blade can be extended.
  • a plurality of laser light sources may also be used (not shown). These can be the same or different in strength, and also have different jet properties. Also, more than two foci can be formed, which allows, for example, the coupling of high powers in large material depths (not shown).

Landscapes

  • 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)
  • Turbine Rotor Nozzle Sealing (AREA)
EP13157238.0A 2013-02-28 2013-02-28 Procédé de fabrication d'une couche d'isolation thermique pour composants et couche d'isolation thermique Withdrawn EP2772567A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13157238.0A EP2772567A1 (fr) 2013-02-28 2013-02-28 Procédé de fabrication d'une couche d'isolation thermique pour composants et couche d'isolation thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13157238.0A EP2772567A1 (fr) 2013-02-28 2013-02-28 Procédé de fabrication d'une couche d'isolation thermique pour composants et couche d'isolation thermique

Publications (1)

Publication Number Publication Date
EP2772567A1 true EP2772567A1 (fr) 2014-09-03

Family

ID=47844088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13157238.0A Withdrawn EP2772567A1 (fr) 2013-02-28 2013-02-28 Procédé de fabrication d'une couche d'isolation thermique pour composants et couche d'isolation thermique

Country Status (1)

Country Link
EP (1) EP2772567A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4377371A (en) * 1981-03-11 1983-03-22 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Laser surface fusion of plasma sprayed ceramic turbine seals
US5576069A (en) * 1995-05-09 1996-11-19 Chen; Chun Laser remelting process for plasma-sprayed zirconia coating
US20020172837A1 (en) * 1996-12-10 2002-11-21 Allen David B. Thermal barrier layer and process for producing the same
EP1743729A2 (fr) * 2005-06-30 2007-01-17 General Electric Company Composants de turbine en Niobium Silicides ayant une partie avec une composition différente; méthodes de revêtement de Niobium silicide par laser sur un composant de turbine, avec réparation éventuelle
US20080145629A1 (en) * 2006-12-15 2008-06-19 Siemens Power Generation, Inc. Impact resistant thermal barrier coating system
FR2941964A1 (fr) * 2009-02-11 2010-08-13 Snecma Methode de traitement d'une barriere thermique recouvrant un substrat metallique en superalliage et piece thermomecanique resultant de cette methode de traitement
US20120164376A1 (en) * 2010-12-23 2012-06-28 General Electric Company Method of modifying a substrate for passage hole formation therein, and related articles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4377371A (en) * 1981-03-11 1983-03-22 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Laser surface fusion of plasma sprayed ceramic turbine seals
US5576069A (en) * 1995-05-09 1996-11-19 Chen; Chun Laser remelting process for plasma-sprayed zirconia coating
US20020172837A1 (en) * 1996-12-10 2002-11-21 Allen David B. Thermal barrier layer and process for producing the same
EP1743729A2 (fr) * 2005-06-30 2007-01-17 General Electric Company Composants de turbine en Niobium Silicides ayant une partie avec une composition différente; méthodes de revêtement de Niobium silicide par laser sur un composant de turbine, avec réparation éventuelle
US20080145629A1 (en) * 2006-12-15 2008-06-19 Siemens Power Generation, Inc. Impact resistant thermal barrier coating system
FR2941964A1 (fr) * 2009-02-11 2010-08-13 Snecma Methode de traitement d'une barriere thermique recouvrant un substrat metallique en superalliage et piece thermomecanique resultant de cette methode de traitement
US20120164376A1 (en) * 2010-12-23 2012-06-28 General Electric Company Method of modifying a substrate for passage hole formation therein, and related articles

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