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1. (WO2007006681) CERAMIC HEAT INSULATING LAYER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/006681 International Application No.: PCT/EP2006/063826
Publication Date: 18.01.2007 International Filing Date: 04.07.2006
IPC:
C23C 28/00 (2006.01) ,C23C 30/00 (2006.01) ,C23C 4/04 (2006.01) ,C23C 4/02 (2006.01) ,F01D 5/28 (2006.01)
C CHEMISTRY; METALLURGY
23
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
C
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
28
Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups C23C2/-C23C26/173
C CHEMISTRY; METALLURGY
23
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
C
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
30
Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
C CHEMISTRY; METALLURGY
23
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
C
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
4
Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
04
characterised by the coating material
C CHEMISTRY; METALLURGY
23
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
C
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
4
Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
02
Pretreatment of the material to be coated, e.g. for coating on selected surface areas
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
D
NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
5
Blades; Blade-carrying members; Heating, heat-insulating, cooling, or antivibration means on the blades or the members
12
Blades
28
Selecting particular materials; Measures against erosion or corrosion
Applicants:
ALSTOM Technology Ltd [CH/CH]; Brown Boveri Strasse 7 CH-5400 Baden, CH (AllExceptUS)
NAZMY, Mohamed Youssef [CH/CH]; CH (UsOnly)
Inventors:
NAZMY, Mohamed Youssef; CH
Common
Representative:
ALSTOM Technology Ltd; Brown Boveri Strasse 7/664/2 CH-5401 Baden, CH
Priority Data:
01152/0512.07.2005CH
Title (DE) KERAMISCHE WÄRMEDÄMMSCHICHT
(EN) CERAMIC HEAT INSULATING LAYER
(FR) COUCHE CALORIFUGE CERAMIQUE
Abstract:
(DE) Die Erfindung betrifft eine keramische Wärmedämmschicht (8) zur Beschichtung der Oberfläche (7) einer aus einer Nickel-Basis-Superlegierung und einer wahlweise darauf aufgebrachten metallischen Haftschicht (6) bestehenden Komponente (1), vorzugsweise einer Gasturbinenkomponente. Die Wärmedämmschicht (8) besteht aus mit Yttriumoxid (Y2O3) stabilisiertem Zirkonoxid (ZrO2) und herstellungsbedingten Verunreinigungen, sowie mindestens einer hochtemperatur- und oxidationsbeständigen intermetallische Verbindung, wie beispielsweise NiAl, YRh, Erlr, deren Volumenanteil mit zunehmenden Abstand von der Oberfläche (7) der Komponente (1)/der Haftschicht (6) kontinuierlich oder stufenweise abnimmt. Der Vorteil der Erfindung besteht darin, dass durch die allmähliche Veränderung der Zusammensetzung der Wärmedämmschicht (8) ein weniger steiler Spannungsgradient erzeugt wird. Dies führt zu einer höheren Dehnungstoleranz der Wärmedämmschicht (8) und damit einerseits zu einer erhöhten Lebensdauer bei thermischer Beanspruchung (kein Abplatzen) und anderseits zur Möglichkeit, dickere Wärmedämmschichten (8) aufzubringen und somit die beschichteten Komponenten (1) Bauteile bei höheren Temperaturen einzusetzen.
(EN) The invention relates to a ceramic heat insulating layer (8) for coating the surface (7) of a component (1), preferably a gas turbine component, which is composed of a nickel-base superalloy and a metallic adhesive layer (6) that is optionally applied thereto. The heat insulating layer (8) contains zirconium oxide (ZrO2) stabilized by means of yttria (Y2O3), production-related impurities, and at least one high temperature-resistant and oxidation-resistant intermetallic compound, e.g. NiAl, YRh, Erlr, whose volume fraction decreases continuously or gradually as the distance from the surface (7) of the component (1)/the adhesive layer (6) increases. The advantage of the invention lies in the fact that a less steep tensile gradient is obtained due to the gradual change of the composition of the heat insulating layer (8), resulting in greater elasticity tolerance of the heat insulating layer (8) and thus an increased service life under thermal stress (no flaking) while making it possible to apply thicker heat insulating layers (8) and therefore use the coated components (1) at higher temperatures.
(FR) L'invention concerne une couche calorifuge (8) céramique servant à recouvrir la surface (7) d'un composant (1), de préférence un composant de turbine à gaz, constitué d'un superalliage à base de Nickel et d'une couche adhésive (6) métallique appliquée optionnellement sur celui-ci. Cette couche calorifuge (8) est constituée d'oxyde de zirconium (ZrO2) stabilisé avec de l'oxyde d'yttrium (Y2O3) et d'impuretés dues à la production, ainsi que d'au moins un composé intermétallique résistant à des températures élevées et à l'oxydation, tel que les composés NiAl, YRh, Erlr, le pourcentage en volume de ce composé diminuant de façon continue ou progressive tandis que la distance par rapport à la surface (7) du composant (1) / de la couche adhésive (6) augmente. L'avantage de l'invention est que la modification graduelle de la composition de la couche calorifuge (8) permet d'obtenir un gradient de tension moins fort. Il en découle une augmentation de la tolérance de dilatation de la couche calorifuge (8) et par là même un accroissement de la durée de vie en présence d'une contrainte thermique (absence de thermoclase) et d'autre part une augmentation de l'épaisseur des couches calorifuges (8) pouvant être appliquées, ce qui permet d'utiliser les composants (1) pourvus d'un tel revêtement à des températures supérieures.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP1902160US20080241560US20100104764