EP1511883A1 - Couche d'isolation thermique - Google Patents

Couche d'isolation thermique

Info

Publication number
EP1511883A1
EP1511883A1 EP03752714A EP03752714A EP1511883A1 EP 1511883 A1 EP1511883 A1 EP 1511883A1 EP 03752714 A EP03752714 A EP 03752714A EP 03752714 A EP03752714 A EP 03752714A EP 1511883 A1 EP1511883 A1 EP 1511883A1
Authority
EP
European Patent Office
Prior art keywords
matrix material
insulation layer
thermal insulation
layer according
thermal
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Withdrawn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
EP03752714A
Other languages
German (de)
English (en)
Inventor
Jens Birkner
Werner Stamm
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 EP03752714A priority Critical patent/EP1511883A1/fr
Publication of EP1511883A1 publication Critical patent/EP1511883A1/fr
Withdrawn legal-status Critical Current

Links

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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process

Definitions

  • the invention relates to an insulation layer according to claim 1.
  • Thermal insulation layers are applied to heat-stressed components, e.g. Turbine blades applied in gas turbines in order to protect a heat-sensitive, for example metallic substrate of these components from heat.
  • the thermal insulation layer consists, for example, of zirconium oxide or partially stabilized zirconium oxide with yttrium oxide.
  • An MCrAlY or diffusion layer is often applied between the insulation layer and the substrate.
  • EP 1 029 101 B1 shows a thermal barrier coating which has the composition LaAl0 3 , ie a perovskite.
  • US Pat. No. 5,310,575 shows a material in which zirconium oxide is mixed in a matrix made of a spinel.
  • GB 745,257 discloses a heat insulation layer, the heat insulation layer being a spinel, a pyrochlore or zirconium oxide.
  • US 5,914,189 discloses a thermal barrier coating which is a mixture of a spinel and calcium zirconate (CaZr0 3 ).
  • the object is achieved by a thermal barrier coating according to claim 1.
  • the thermal barrier coating according to the invention is a mixture of a matrix material such as e.g. Zirconium oxide or aluminum oxide and at least one admixed material that has a reduced sintering potential at the operating temperatures of the thermal barrier coating.
  • Such admixed materials are preferably ceramics from the systems of pyrochlores, such as La 2 Zr 2 0 7 , La 2 Hf 2 0 7 and perovskites, such as CaZr0 3 , LaAl0 3 and spinels, such as MgCr 2 0 4 , MgAl 2 0 , NiAl 2 0 with a volume fraction of 10% and 50%.
  • pyrochlores such as La 2 Zr 2 0 7 , La 2 Hf 2 0 7 and perovskites, such as CaZr0 3 , LaAl0 3 and spinels, such as MgCr 2 0 4 , MgAl 2 0 , NiAl 2 0 with a volume fraction of 10% and 50%.
  • the matrix material consists, for example, of zirconium oxide (Zr0 2 ) or partially stabilized zirconium oxide (Zr0 2 and 7% - 8% yttrium oxide (Y 2 0 3 ) or another ceramic.
  • the admixture with zirconium oxide enables the elongation tolerance to be adjusted in the high temperature range Expansion coefficients of the admixture used For example, but not necessarily above or below the coefficient of expansion of the zirconium oxide layer. If the zirconium oxide matrix is sintered, that is to say if the matrix shrinks, the elongation tolerance is locally reduced in the sub-area predominantly composed of zirconium oxide.
  • particles from the admixtures and the zirconium oxide additionally generate cracks and cavities during use at high temperatures, which compensate for the elongation tolerance lost in the zirconium oxide matrix, since the admixtures do not sinter, i.e. do not shrink, or shrink to a lesser extent, even if the thermal Expansion coefficient is the same.
  • the sintering of the matrix additionally creates cracks and porosities between the matrix and admixture, which compensate for the lost ductility through cracking or porosity.
  • microporosity / microcracks in the poor insulation layer is thus obtained by the admixture with reduced sintering potential and / or different expansion coefficients of the matrix and admixture.
  • the microstructure can be adjusted in such a way that one for the elongation tolerance of the Thermal insulation layer system necessary porosity and reduction of the entanglement of the stem structures is achieved with EBPVD layers.
  • the oxygen conductivity can be reduced, so that oxidation of the MCrAlY layer is also reduced.

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)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

Les couches d'isolation thermique classiques à base d'oxyde de zirconium font l'objet d'un frittage à températures élevées et perdent leur tolérance de dilatation. La couche d'isolation thermique à base d'oxyde de zirconium selon l'invention comprend des produits d'addition qui compensent la perte de tolérance de dilatation de l'oxyde de zirconium.
EP03752714A 2002-05-15 2003-04-24 Couche d'isolation thermique Withdrawn EP1511883A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03752714A EP1511883A1 (fr) 2002-05-15 2003-04-24 Couche d'isolation thermique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02010837 2002-05-15
EP02010837A EP1362933A1 (fr) 2002-05-15 2002-05-15 Revêtement de barrière thermique
PCT/EP2003/004270 WO2003097901A1 (fr) 2002-05-15 2003-04-24 Couche d'isolation thermique
EP03752714A EP1511883A1 (fr) 2002-05-15 2003-04-24 Couche d'isolation thermique

Publications (1)

Publication Number Publication Date
EP1511883A1 true EP1511883A1 (fr) 2005-03-09

Family

ID=29265933

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02010837A Withdrawn EP1362933A1 (fr) 2002-05-15 2002-05-15 Revêtement de barrière thermique
EP03752714A Withdrawn EP1511883A1 (fr) 2002-05-15 2003-04-24 Couche d'isolation thermique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02010837A Withdrawn EP1362933A1 (fr) 2002-05-15 2002-05-15 Revêtement de barrière thermique

Country Status (4)

Country Link
US (1) US20040146741A1 (fr)
EP (2) EP1362933A1 (fr)
JP (1) JP2005525472A (fr)
WO (1) WO2003097901A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1806430A1 (fr) * 2006-01-09 2007-07-11 Siemens Aktiengesellschaft Revêmtement céramique ayant une haute porositée, utilisation de celle-ci revêtement et composant comprenant telle revêtement
DE102007030602A1 (de) 2007-06-28 2009-01-02 Siemens Ag Bauteil mit einer keramischen Schicht, in die Partikel eingelagert sind, und Verfahren zu dessen Herstellung
FR2925576A3 (fr) * 2007-12-21 2009-06-26 Renault Sas Procede de gestion d'un circuit d'huile de moteur a combustion interne
US20150274981A1 (en) * 2010-09-22 2015-10-01 Skyworks Solutions, Inc. Dual function lanthanide coatings
CN107473739B (zh) * 2017-09-08 2020-08-07 中国人民解放军国防科技大学 锆酸镧复相陶瓷及其制备方法和应用

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE547937A (fr) * 1952-08-08 1900-01-01
US5310575A (en) * 1987-11-03 1994-05-10 Robert Bosch Gmbh Method of making a porous ceramic protective layer on an electrode of an electrochemical sensor for exposure to hot gas
WO1997001436A1 (fr) * 1995-06-26 1997-01-16 General Electric Company Composite pour revetement formant barriere thermique protege, a couches multiples
JP2001521993A (ja) * 1997-11-03 2001-11-13 シーメンス アクチエンゲゼルシヤフト 製品、特にセラミックス断熱層を有するガスタービンの構造部材
DE19807163C1 (de) * 1998-02-20 1999-10-28 Rainer Gadow Wärmedämmaterial und Verfahren zum Herstellen eines solchen
JP4218744B2 (ja) * 1998-09-10 2009-02-04 日鉄ハード株式会社 溶射材料およびそれを溶射して形成した皮膜を有する部材
EP1247941A1 (fr) * 2001-04-03 2002-10-09 Siemens Aktiengesellschaft Aube de turbine à gaz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03097901A1 *

Also Published As

Publication number Publication date
US20040146741A1 (en) 2004-07-29
WO2003097901A1 (fr) 2003-11-27
EP1362933A1 (fr) 2003-11-19
JP2005525472A (ja) 2005-08-25

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