EP0194392B1 - Nickel-Basis-Superlegierungen, die insbesondere geeignet sind als kompatible Beschichtungen für moderne Superlegierungen - Google Patents

Nickel-Basis-Superlegierungen, die insbesondere geeignet sind als kompatible Beschichtungen für moderne Superlegierungen Download PDF

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EP0194392B1
EP0194392B1 EP19850400478 EP85400478A EP0194392B1 EP 0194392 B1 EP0194392 B1 EP 0194392B1 EP 19850400478 EP19850400478 EP 19850400478 EP 85400478 A EP85400478 A EP 85400478A EP 0194392 B1 EP0194392 B1 EP 0194392B1
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nickel
article
tantalum
tungsten
chromium
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EP19850400478
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French (fr)
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EP0194392A1 (de
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Melvin Robert Jackson
Swe-Wong Yang
Michael Francis Xavier Gigliotti, Jr.
John Ruel Rairden Iii
Mark Louis Prugar
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General Electric Co
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Priority to SG63390A priority patent/SG63390G/en
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%

Definitions

  • This invention pertains generally to nickel-base superalloys useful in the manufacture of hot-section components of aircraft gas turbine engines, e.g., vanes and rotating blades, and more particularly to compatible coatings especially useful for the enhancement of the environmental resistance of such hot-section components made from advanced nickel-base superalloys and nickel-base eutectic superalloys.
  • Advanced nickel-base superalloys such as the monocarbide reinforced nickel-base eutectic superalloys of the type described, for example, in U.S. 4,292,076 and designed for use as unidirectionally solidified anisotropic metallic bodies, primarily in the form of vanes and rotating blades in aircraft gas turbine engines.
  • the eutectic superalloys have been identified as the next generation of blade alloys beyond directionally solidified and single crystal superalloys. In order to take full temperature advantage of those superalloys, however, coatings are required to provide environmental protection at the high intended use temperatures.
  • the coatings must be tightly bonded, i.e., metallurgically bonded, to the substrate and ideally must not degrade either the mechanical properties of the substrate (e.g., ductility, stress rupture strength and resistance to thermal fatique) or the chemical properties of the substrate (e.g., oxidation resistance and hot corrosion resistance).
  • the mechanical properties of the substrate e.g., ductility, stress rupture strength and resistance to thermal fatique
  • the chemical properties of the substrate e.g., oxidation resistance and hot corrosion resistance
  • Examples of adverse effects to eutectic superalloys which have resulted from incompatible coatings are fiber denudation near the coating/substrate interface due to outward diffusion of carbon from the fiber into the coating and the formation of brittle precipitates in the substrate due to interdiffusion between the coating and the substrate.
  • nickel-base superalloy which is mechanically and chemically compatible with advanced nickel-base superalloys and nickel-base eutectic superalloys, and which possesses excellent resistance to high temperature oxidation.
  • the alloy of the invention is, therefore, particularly useful as a protective environmental coating for the external surfaces of hot stage aircraft gas turbine engine components, e.g., rotating blades and stationary vanes, made from advanced nickel-base superalloys and nickel-base eutectic superalloys.
  • the superalloy of the invention consists essentially of about, by weight, 1 to 10% cobalt, 6 to 12% chromium, 5 to 8% aluminum, 1 to 10% tantalum, 1 to 10% tungsten, 0 to 3% rhenium, 0 to 2% molybdenum, 0.1 to 2% hafnium, 0.005 to 0.1 % boron, 0.005 to 0.25% carbon, the balance being nickel and incidental impurities.
  • novel superalloy will be applied most frequently as a protective environmental coating to comprise at least a portion of the outer surface of gas turbine engine components and articles
  • novel alloy of this invention is useful as a thicker, built-up deposit applied to selected regions of substrates, such as aircraft gas turbine engine components, for repair purposes, or as the tip portion of rotating blades.
  • Such applications contemplate composite articles of manufacture having as a substrate an article, such as a gas turbine engine airfoil, made of a nickel-base superalloy or nickel-base eutectic superalloy and one or more thick, built-up regions contiguous with, i.e., joined to and forming an integral part of, the substrate wherein the one or more regions comprise at least a portion of the outer surface of the composite article and are of the above-described novel superalloy composition.
  • a substrate such as a gas turbine engine airfoil, made of a nickel-base superalloy or nickel-base eutectic superalloy and one or more thick, built-up regions contiguous with, i.e., joined to and forming an integral part of, the substrate wherein the one or more regions comprise at least a portion of the outer surface of the composite article and are of the above-described novel superalloy composition.
  • the present invention relates to a nickel-base superalloy which is mechanically and chemically compatible with advanced nickel-base superalloys and nickel-base eutectic superalloys and which possesses excellent resistance to high temperature oxidation.
  • the superalloy of the invention consists essentially of cobalt, chromium, aluminum, tantalum, tungsten, rhenium, molybdenum, hafnium, boron and carbon in the percentages (by weight) set forth in Table I below, the balance being nickel and incidental impurities.
  • the present alloy is particularly useful as a protective environmental coating, of between 0.0508 and 2.54 mm (0.002 and 0.1 inches) in thickness, for the external surfaces of solid and hollow, fluid-cooled gas turbine engine components, e.g., rotating blades and stationary vanes, operating in the hot stage sections of such turbines and made from advanced nickel-base superalloys and nickel-base eutectic superalloys. While it is contemplated that the novel alloy herein described will most frequently be applied as protective environmental coatings to provide at least a portion of the outer surface of gas turbine engine components and articles, it has also been found that the superalloy of the invention is also useful as one or more thicker, built-up deposits applied to selected regions of such articles or component-like substrates.
  • the utilization of plasma spray techniques to deposit the alloy of the invention is preferred. Most preferred is the technique, sometimes referred to as low pressure plasma deposition (LPPD), described in US-A-3,839,618.
  • LPPD low pressure plasma deposition
  • Alloys in accordance with the present invention produce very dense coatings or deposits after plasma spraying and especially after plasma spraying by the above-mentioned LPPD process whereby as-deposited densities of 95% and greater are readily obtained.
  • 6M 6M-type coatings by way of designation
  • an alloy of the invention i.e., one consisting essentially of, nominally by weight within normal melting tolerances, 4% Co, 8.5% Cr, 6% Al, 5% Ta, 4.5% W, 1.5 Re, 1.5% Mo, 0.9% Hf, 0.01% B, and 0.09% C, the balance nickel and incidental impurities, onto flat plate-like substrates and pin-like substrates for environmental testing.
  • NiCoCrAIY Ni-23Co-18Cr-12.5AI-0.3Y
  • US-.A-3,928,026 a coating typically used heretofore to enhance the resistance of such substrates to environmental degradation.
  • the coating material selected was a NiCoCrAIY (Ni-23Co-18Cr-12.5AI-0.3Y) of the type described in US-.A-3,928,026.
  • the B-type substrates Prior to coating deposition, the B-type substrates were solution treated at 1273.9°C (2325°F) for two hours and the N-type substrates were solution treated at 1265.5°C (2310°F) for two hours irrespective of the coating to be applied.
  • the process of applying the NiCoCrAIY type coatings has been described above.
  • the 6M coatings were applied by the above-described LPPD plasma spray process.
  • a commercially available standard internal feed plasma spray gun and the process parameters of Table II were used.
  • the N-type substrates a commercially available standard external feed plasma spray gun and the process parameters of Table III were used.
  • the structure of the B-type substrate is one of an aligned eutectic (TaC) fibrous reinforcing phase in a y/y' matrix while the structure of the N-type substrate is one of y' precipitates in a y matrix.
  • Table IV presents the results of cyclic oxidation tests on pin-like specimens conducted under the conditions shown in the table using a natural gas flame at the velocities shown in the table.
  • the specimens were rotated for uniform exposure and cycled out of the flame 1 or 6 times per hour to cool the specimens to about 426.6°C (800°F). Failure is defined as penetration of the coating to the extent that (substrate) oxidation begins to occur.
  • Hot corrosion testing was conducted at 926.6°C (1700°F) using a JP-5 fuel-fired flame with 5 ppm salt added to the combustion products. The specimens were rotated for uniform exposure and cycled out of the flame once every hour.
  • the alloy of the invention as a coating provides good protection to both substrates, and particularly to the B-type substrate.
  • the oxidation resistance provided by the alloy of the invention is somewhat greater than would be expected based on a study of its overall composition.
  • the alloy of the invention as a coating provides acceptable environmental protection against hot corrosion, i.e., greater than 540 hours life on B-type substrates (test terminated prior to failure) and 1000 hours on N-type substrates.
  • the coated specimens were evaluated metallographically to determine the extent of interaction between the coatings on the substrate.
  • the results are given in Table V which lists the extent, if any, of the denuded and platelet formation zones, the sum of which comprise the interaction zone, following exposure in the oxidation tests at the temperatures and for the times shown.
  • Platelets such as those shown in Figures 3 and 7 for NiCoCrAIY on the B and N-type substrates, respectively, are a result of the interdiffusion of elements between the coating and the substrate, i.e., a chemical incompatibility between the coating and the substrate. The platelets are undesirable due to their needle-like morphology and brittleness.
  • the denuded zone also shown in Figures 3 and 7, is a zone which has been depleted ofy' due to the diffusion of elements from the substrate to the coating, leaving a weakened, primarily y matrix.
  • the alloy of the invention also possesses high temperature strength superior to NiCoCrAIY. Elevated temperature tensile tests on very thick 1.27 cm (1/2 inch) deposits of the NiCoCrAIY and 6M-type alloys showed that at 982.2°C (1800°F) the ultimate tensile strength (UTS) of the materials was about (7 and 30 Ksi) 48-23 and 206.7 MPa respectively, while at 1093.3°C (2000°F) the UTS of the materials was about 3 and 7, respectively. The higher strength of the 6M-type alloy is expected to result in greatly improved resistance to thermal/mechanical fatigue cracking.
  • the difference in the coefficient of thermal expansion (a) between the alloy of the invention and nickel-base superalloy substrates is less than that between NiCoCrAIY and the same superalloy substrates.
  • the smaller difference in a reduces the stresses imposed on a coating alloy in service, and thereby reduces the propensity for coating spallation and thermal fatigue cracking.
  • the low propensity of the alloy of the invention to form interaction zones, and particularly its low propensity to form platelets, plus its higher strength and thermal expansion compatibility with superalloy substrates makes the alloy of the invention a coating which is truly chemically and physically compatible with nickel-base superalloy substrates, in addition to providing the environmental resistance required in severe high pressure, high temperature turbine environments.
  • the novel alloys of this invention are useful as thicker, built-up deposits applied to selected regions of aircraft gas turbine engine components, such as the tip portions of rotating blades or stationary vanes, or for purposes of repairing nicked or damaged regions as typically occur on such components as airfoils.
  • the alloys of the invention are more in the nature of a superalloy from which components are made, e.g., that structural or weight-carrying alloys, and less in the nature of coatings.
  • the changes required in the plasma spraying process to effect the build-up of thicker deposits, as opposed to thin coatings, are well within the knowledge and expertise of those ordinarily skilled in the plasma spraying arts.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (18)

1. Zusammensetzung zum Aufbringen auf Nickel-Basis-Superlegierungs-Substrate, bestehend aus, bezogen auf das Gewicht, 1 bis 10% Kobalt, 6 bis 12% Chrom, 5 bis 8% Aluminium, 1 bis 10% Tantal, 1 bis 10% Wolfram, 0 bis 3% Rhenium, 0 bis 2% Molybdän, 0,1 bis 2% Hafnium, 0,005 bis 0,1% Bor, 0,005 bis 0,25% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
2. Zusammensetzung nach Anspruch 1, bestehend aus, bezogen auf das Gewicht, 1 bis 6% Kobalt, 7 bis 10% Chrom, 5 bis 7% Aluminium, 4 bis 6% Tantal, 3,5 bis 5,5% Wolfram, 0 bis 3% Rhenium, 0 bis 2% Molybdän, 0,5 bis 1,5% Hafnium, 0,005 bis 0,025% Bor, 0,005 bis 0,25% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
3. Zusammensetzung nach Anspruch 2, bestehend aus, bezogen auf das Gewicht, 3,8 bis 4,2% Kobalt, 8,3 bis 8,7% Chrom, 5.8 bis 6,2% Aluminium, 4,7 bis 5,3% Tantal, 4,2 bis 4,8% Wolfram, 1,2 bis 1,8% Rhenium, 1,3 bis 1,7% Molybdän, 0,7 bis 1,1% Hafnium, 0,005 bis 0,02% Bor, 0,005 bis 0,2% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
4. Bei hoher Temperatur oxidations- und korrosionsbeständiger Gegenstand aus einer überzogenen Nickel-Basis-Superlegierung, gekennzeichnet durch eine hohe Überzugs-Substrat-Verträglichkeit, wobei der Gegenstand umfaßt:
a) ein Nickel-Basis-Superlegierungs- oder eutektisches Nickel-Basis-Superlegierungs-Substrat und
b) einen Überzug, der mindestens einen Teil der änderen Oberfläche des Gegenstandes bilder, wobei der Überzug besteht aus, bezogen auf das Gewicht, 1 bis 10% Kobalt, 6 bis 12% Chrom, 5 bis 8% Aluminium, 1 bis 10% Tantal, 1 bis 10% Wolfram, 0 bis 3% Rhenium, 0 bis 2% Molybdän, 0,1 bis 2% Hafnium, 0,005 bis 0,1% Bor, 0,005 bis 0,25% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
5. Gegenstand nach Anspruch 4, bei dem der Überzug besteht aus, bezogen auf das Gewicht, 1 bis 6% Kobalt, 7 bis 10% Chrom, 5 bis 7% Aluminium, 4 bis 6% Tantal, 3,5 bis 5,5% Wolfram, 0 bis 3% Rhenium, 0 bis 2% Molybdän, 0,5 bis 1,5% Hafnium, 0,005 bis 0,025% Bor, 0,005 bis 0,25% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
6. Gegenstand nach Anspruch 5, worin der Überzug besteht aus, bezogen auf das Gewicht, 3,8 bis 4,2% Kobalt, 8,3 bis 8,7% Chrom, 5,8 bis 6,2% Aluminium, 4,7 bis 5,3% Tantal, 4,2 bis 4,8% Wolfram, 1,2 bis 1,8% Rhenium, 1,3 bis 1,7% Molybdän, 0,7 bis 1,1% Hafnium, 0,005 bis 0,02% Bor, 0,005 bis 0,2% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
7. Gegenstand nach Anspruch 4, worin das Substrat einen Verbundstoff aus einer Nickel-Basis-Superlegierungsmatrix und einer ausgerichteten, verstärkenden, faserförmigen, eutektischen Monokarbidphase, die in der Matrix eingebettet ist, umfaßt, das Substrat besteht aus, bezogen auf das Gewicht, mindestens einer Menge, die über eine Verunreinigungsmenge hinausgeht, bis zu 0,02% Bor, 0 bis 9% Rhenium, 0 bis weniger als 0,8% Titan, 0 bis 20% Chrom, 0 bis 10% Aluminium, 3 bis 15% Tantal, 0,1 bis 1 % Kohlenstoff, 0 bis 20% Kobalt, 0 bis 20% Wolfram, 0 bis 7% Vanadium, 0 bis 10% Molybdän, 0 bis 3% Niob, 0 bis 3% Hafnium, 0 bis 1,5% Zirkonium, Rest Nickel und übliche Verunreinigungen.
8. Gegenstand nach Anspruch 7, worin das Substrat im wesentlichen besteht aus etwa, bezogen auf das Gewicht, 0,01% Bor, 6,44% Rhenium, 3,84 Chrom, 5,34% Aluminium, 11,37% Tantal, 0,43% Kohlenstoff, 3,8% Kobalt, 4,33% Wolfram, 3,01% Molybdän, Rest Nickel und übliche Verunreinigungen.
9. Gegenstand nach Anspruch 4, worin das Substrat eine verbesserte Nickel-Basis-Superlegierung umfaßt, die durch gerichtetes Erstarren zu einem Einkristall gießbar ist und besteht aus, bezogen auf das Gewicht, 7 bis 12% Chrom, 1 bis 5% Molybdän, 3 bis 5% Titan, 3 bis 5% Aluminium, 5 bis 15% Kobalt, 3 bis 12% Wolfram, 2 bis 6% Tantal, 0 bis 10% Rhenium, 0 bis 2% Niob, 0 bis 3% Vanadium, 0 bis 2% Hafnium, Rest Nickel und übliche Verunreinigungen, wobei die Superlegierung weiter dadurch gekennzeichnet ist, daß Kohlenstoff, Bor und Zirkonium im wesentlichen abwesend sind, die Legierung ein AI zu Ti-Verhältnis im Bereich von 0,5 bis 1 hat, während das Cr zu AI-Verhältnis im Bereich von 1,5 bis 4 gehalten ist.
10. Gegenstand nach Anspruch 9, worin das Substrat besteht aus, bezogen auf das Gewicht, etwa 9,3% Chrom, 7,5% Kobalt, 3,7% Aluminium, 4% Tantal, 4,2% Titan, 1,5% Molybdän, 6% Wolfram, 0,5% Niob, Rest Nickel und übliche Verunreinigungen.
11. Verbundgegenstand, umfassend:
(i) ein Nickel-Basis-Superlegierungs- oder eutektisches Nickel-Basis-Superlegierungs-Substrat und
(ii) ein oder mehrere dicke, aufgebaute Bereiche, die integral mit dem Substrat ausgebildet sind, wobei diese Bereiche mindestens einen Teil der äußeren Oberfläche des Gegenstandes darstellen und sie eine Zusammensetzung aufweisen, die besteht aus, bezogen auf das Gewicht, 1 bis 10% Kobalt, 6 bis 12% Chrom, 5 bis 8% Aluminium, 1 bis 10% Tantal, 1 bis 10% Wolfram, 0 bis 3% Rhenium, 0 bis 2% Molybdän, 0,1 bis 2% Hafnium, 0,005 bis 0,1% Bor, 0,005 bis 0,25% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
12. Verbundgegenstand nach Anspruch 11, worin die Bereiche eine Zusammensetzung haben, die besteht aus, bezogen auf das Gewicht, 1 bis 6% Kobalt, 7 bis 10% Chrom, 5 bis 7% Aluminium, 4 bis 6% Tantal, 3,5 bis 5,5% Wolfram, 0 bis 3% Rhenium, 0 bis 2% Molybdän, 0,5 bis 1,5% Hafnium, 0,005 bis 0,025% Bor, 0,005 bis 0,25% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
13. Verbundgegenstand nach Anspruch 12, worin die Bereiche eine Zusammensetzung haben, die besteht aus, bezogen auf das Gewicht, 3,8 bis 4,2% Kobalt, 8,3 bis 8,7% Chrom, 5,8 bis 6,2% Aluminium, 4,7 bis 5,3% Tantal, 4,2 bis 4,8% Wolfram, 1,2 bis 1,8% Rhenium, 1,3 bis 1,7% Molybdän, 0,7 bis 1,1% Hafnium, 0,005 bis 0,02% Bor, 0,005 bis 0,2% Kohlenstoff, Rest Nickel und übliche Verunreinigungen.
14. Gegenstand nach Anspruch 11, worin das Substrat einen Verbundstoff aus einer Nickel-Basis-Superlegierungsmatrix und einer ausgerichteten, verstärkenden, faserförmigen, eutektischen Monokarbidphase umfaßt, die in die Matrix eingebettet ist, wobei das Substrat besteht aus, bezogen auf das Gewicht, mindestens einer Menge, die über eine Verunreinigungsmenge hinausgeht, bis zu 0,02% Bor, 0 bis 9% Rhenium, 0 bis weniger als 0,8% Titan, 0 bis 20% Chrom, 0 bis 10% Aluminium, 3 bis 15% Tantal, 0,1 bis 1 % Kohlenstoff, 0 bis 20% Kobalt, 0 bis 20% Wolfram, 0 bis 7% Vanadium, 0 bis 10% Molybdan, 0 bis 3% Niob, weniger als 0,15% Hafnium, 0 bis 1,5% Zirkonium, Rest im wesentlichen Nickel und übliche Verunreinigungen.
15. Gegenstand nach Anspruch 14, worin das Substrat einen Verbundstoff aus einer Nickel-Basis-Superlegierungsmatrix und eine ausgerichtete, stärkende, faserförmige, eutektische Monokarbidfaser umfaßt, die in die Matrix eingebettet ist, wobei das Substrat besteht aus etwa, bezogen auf das Gewicht, 0,01% Bor, 6,44% Rhenium, 3,84% Chrom, 5,34% Aluminium, 11,37% Tantal, 0,43% Kohlenstoff, 3,8% Kobalt, 4,33% Wolfram, 3,01% Molybdän, Rest Nickel und übliche Verunreinigungen.
16. Gegenstand nach Anspruch 11, worin das Substrat eine verbesserte Nickel-Basis-Superlegierung umfaßt, die durch gerichtete Erstarrung als Einkristall gegossen werden kann, und die besteht aus, bezogen auf das Gewicht, 7 bis 12% Chrom, 1 bis 5% Molybdän, 3 bis 5% Titan, 3 bis 5% Aluminium, 5 bis 15% Kobalt, 3 bis 12% Wolfram, 2 bis 6% Tantal, 0 bis 10% Rhenium, 0 bis 2% Niob, 0 bis 3% Vanadium, 0 bis 2% Hafnium, Rest Nickel und übliche Verunreinigungen und die weiter dadurch gekennzeichnet ist, daß Kohlenstoff, Bor und Zirkonium im wesentlichen abwesend sind, die Legierung ein AI zu Ti-Verhältnis im Bereich von 0,5 bis 1 hat, während das Cr zu AI-Verhältnis im Bereich von 1,5 zu 4 gehalten ist.
17. Gegenstand nach Anspruch 16, worin das Substrat eine verbesserte Nickel-Basis-Superlegierung umfaßt, die durch gerichtete Erstarrung als Einkristall gegossen werden kann, und die besteht aus, bezogen auf das Gewicht, etwa 9,3% Chrom, 7,5% Kobalt, 3,7% Aluminium, 4% Tantal, 4,2% Titan, 1,5% Molybdän, 6% Wolfram, 0,5% Niob, Rest Nickel und übliche Verunreinigungen.
18. Gegenstand nach Anspruch 11, worin das Substrat ein drehbare oder stationäre Schaufel einer Flugzeug-Gasturbine ist und der Überzug sich auf der Spitze der Schaufel befindet.
EP19850400478 1985-03-13 1985-03-13 Nickel-Basis-Superlegierungen, die insbesondere geeignet sind als kompatible Beschichtungen für moderne Superlegierungen Expired EP0194392B1 (de)

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DE8585400478T DE3572512D1 (en) 1985-03-13 1985-03-13 Nickel-base superalloys especially useful as compatible protective environmental coatings for advanced superalloys
EP19850400478 EP0194392B1 (de) 1985-03-13 1985-03-13 Nickel-Basis-Superlegierungen, die insbesondere geeignet sind als kompatible Beschichtungen für moderne Superlegierungen
SG63390A SG63390G (en) 1985-03-13 1990-08-01 Nickel-base superalloys especially useful as compatible protective environmental coatings for advanced superalloys

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EP19850400478 EP0194392B1 (de) 1985-03-13 1985-03-13 Nickel-Basis-Superlegierungen, die insbesondere geeignet sind als kompatible Beschichtungen für moderne Superlegierungen

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EP0194392B1 true EP0194392B1 (de) 1989-08-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1956105A1 (de) 2005-10-25 2008-08-13 Siemens Aktiengesellschaft Legierung, Schutzschicht zum Schutz eines Bauteils gegen Korrision und Oxidation bei hohen Temperaturen und Bauteil

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5068084A (en) * 1986-01-02 1991-11-26 United Technologies Corporation Columnar grain superalloy articles
US5273712A (en) * 1989-08-10 1993-12-28 Siemens Aktiengesellschaft Highly corrosion and/or oxidation-resistant protective coating containing rhenium
US5401307A (en) * 1990-08-10 1995-03-28 Siemens Aktiengesellschaft High temperature-resistant corrosion protection coating on a component, in particular a gas turbine component
US5582635A (en) * 1990-08-10 1996-12-10 Siemens Aktiengesellschaft High temperature-resistant corrosion protection coating for a component in particular a gas turbine component
US6924046B2 (en) 2001-10-24 2005-08-02 Siemens Aktiengesellschaft Rhenium-containing protective layer for protecting a component against corrosion and oxidation at high temperatures
EP1524334A1 (de) 2003-10-17 2005-04-20 Siemens Aktiengesellschaft Schutzschicht zum Schutz eines Bauteils gegen Korrosion und Oxidation bei hohen Temperaturen und Bauteil
US7476450B2 (en) * 2006-03-24 2009-01-13 United Technologies Corporation Coating suitable for use as a bondcoat in a thermal barrier coating system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896547A (en) * 1974-05-02 1975-07-29 Sterndent Corp Prosthetic article and method for manufacture
US4313760A (en) * 1979-05-29 1982-02-02 Howmet Turbine Components Corporation Superalloy coating composition
US4459160A (en) * 1980-03-13 1984-07-10 Rolls-Royce Limited Single crystal castings
US4447503A (en) * 1980-05-01 1984-05-08 Howmet Turbine Components Corporation Superalloy coating composition with high temperature oxidation resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1956105A1 (de) 2005-10-25 2008-08-13 Siemens Aktiengesellschaft Legierung, Schutzschicht zum Schutz eines Bauteils gegen Korrision und Oxidation bei hohen Temperaturen und Bauteil

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DE3572512D1 (en) 1989-09-28
EP0194392A1 (de) 1986-09-17
SG63390G (en) 1990-09-07

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