# US 2013/0157078 A1 · Nickel-Cobalt-Based Alloy And Bond Coat And Bond Coated Articles Incorporating The Same

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- Number: US 2013/0157078 A1
- Document ID: US20130157078A1
- Status: Published application
- Kind: A1
- Application number: 13/330,090
- Filed: 2011-12-19
- Published: 2013-06-20
- Earliest claimed: 2011-12-19
- Assignees: General Electric Company
- Inventors: Kivilcim Onal; Canan Uslu Hardwicke; Jon Conrad Schaeffer
- Web page: https://patentgrep.com/patent/US20130157078A1

## CPC

- C22C 19/058: {without Mo and W}
- C23C 28/3215: {at least one MCrAlX layer}
- C23C 28/3455: {with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer}
- F01D 5/288: {Protective coatings for blades}
- F05D 2300/17: Alloys
- Y10T 428/12736: Al-base component
- Y10T 428/12931: Co-, Fe-, or Ni-base components, alternative to each other
- Y10T 428/31678: Of metal
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- 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 (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In an exemplary embodiment, a high temperature oxidation and hot corrosion resistant MCrAlX alloy is disclosed, wherein, by weight of the alloy, M comprises nickel in an amount of at least about 30 percent and X comprises from about 0.005 percent to about 0.19 percent yttrium. In another exemplary embodiment, a coated article is disclosed. The article includes a substrate having a surface. The article also includes a bond coat disposed on the surface, the bond coat comprising a high temperature oxidation and hot corrosion resistant MCrAlX alloy, wherein, by weight of the alloy, M comprises at least about 30 percent nickel and X comprises about 0.005 percent to about 0.19 percent yttrium.

## Claims

### Claim 1

A high temperature oxidation and hot corrosion resistant MCrAlX alloy, wherein, by weight of the alloy, M comprises nickel in an amount of at least about 30 percent and X comprises from about 0.005 percent to about 0.19 percent yttrium.

### Claim 2 (depends on 1)

The alloy of claim 1, wherein X further comprises up to about 1.25 percent germanium by weight of the alloy.

### Claim 3 (depends on 1)

The alloy of claim 1, wherein the alloy comprises, by weight of the alloy, from about 5.0 percent to about 15.0 percent cobalt, from about 12.0 percent to about 28.0 percent chromium, from about 6.5 percent to about 11.0 percent aluminum, from about 4.0 percent to about 8.0 percent tantalum, from about 0.005 percent to about 0.5 percent zirconium, from about 0.005 percent to about 0.8 percent hafnium, from about 0.005 percent to about 0.19 percent yttrium, up to about 1.25 percent germanium, and the balance nickel and incidental impurities.

### Claim 4 (depends on 1)

The alloy of claim 1, wherein the alloy comprises, by weight of the alloy, from about 8.5 percent to about 12.0 percent cobalt, from about 16.0 percent to about 21.0 percent chromium, from about 6.5 percent to about 8.5 percent aluminum, from about 4.5 percent to about 7 percent tantalum, from about 0.001 percent to about 0.1 percent zirconium, from about 0.1 percent to about 0.65 percent hafnium, from about 0.005 percent to about 0.19 percent yttrium, up to about 1.25 percent germanium, and the balance nickel and incidental impurities.

### Claim 5 (depends on 1)

The alloy of claim 1, wherein the alloy comprises substantially no silicon or rhenium.

### Claim 6 (depends on 3)

The alloy of claim 3, wherein the incidental impurities comprise sulfur, and sulfur comprises less than about 100 ppm of the alloy.

### Claim 7 (depends on 1)

The alloy of claim 1, wherein the alloy comprises a nickel-based alloy comprising gamma and gamma prime phases.

### Claim 8

A coated article, comprising:
a substrate having a surface; and
a bond coat disposed on the surface, the bond coat comprising a high temperature oxidation and hot corrosion resistant MCrAlX alloy, wherein, by weight of the alloy, M comprises at least about 30 percent nickel and X comprises about 0.005 percent to about 0.19 percent yttrium.

### Claim 9 (depends on 8)

The coated article of claim 8, wherein the alloy comprises, by weight of the alloy, from about 5.0 percent to about 15.0 percent cobalt, from about 12.0 percent to about 28.0 percent chromium, from about 6.5 percent to about 11.0 percent aluminum, from about 4.0 percent to about 8.0 percent tantalum, from about 0.005 percent to about 0.5 percent zirconium, from about 0.05 percent to about 0.8 percent hafnium, from about 0.005 percent to about 0.19 percent yttrium, up to about 1.25 percent germanium, and the balance nickel and incidental impurities.

### Claim 10 (depends on 8)

The coated article of claim 8, wherein the alloy comprises, by weight of the alloy, from about 8.5 percent to about 12.0 percent cobalt, from about 16.0 percent to about 21.0 percent chromium, from about 6.5 percent to about 8.5 percent aluminum, from about 4.5 percent to about 7 percent tantalum, from about 0.001 percent to about 0.1 percent zirconium, from about 0.1 percent to about 0.65 percent hafnium, from about 0.005 percent to about 0.19 percent yttrium, up to about 1.25 percent germanium, and the balance nickel and incidental impurities.

### Claim 11 (depends on 8)

The coated article of claim 8, wherein the alloy comprises substantially no silicon or rhenium.

### Claim 12 (depends on 10)

The coated article of claim 10, wherein the incidental impurities comprise sulfur, and sulfur comprises less than about 100 ppm of the alloy.

### Claim 13 (depends on 8)

The coated article of claim 8, further comprising a thermal barrier coating disposed on the bond coat.

### Claim 14 (depends on 8)

The coated article of claim 8, further comprising an aluminide coating disposed on a surface of the bond coat away from the substrate or disposed between the substrate and the bond coat, or both.

### Claim 15 (depends on 14)

The coated article of claim 14, wherein the aluminide coating is disposed on the surface of the bond coat away from the substrate, and further comprising a thermal barrier coating disposed on the aluminide coating.

### Claim 16 (depends on 8)

The coated article of claim 8, wherein the substrate comprises an Fe-based, Ni-based or Co-based superalloy, or a combination thereof.

### Claim 17 (depends on 8)

The coated article of claim 8, wherein the substrate comprises a turbine blade, vane, shroud, nozzle, combustor or fuel nozzle, or a combination thereof.

### Claim 18 (depends on 8)

The coated article of claim 8, wherein the bond coat comprises a replacement bond coat or a repair bond coat, or a combination thereof.

### Claim 19 (depends on 17)

The coated article of claim 17, wherein the bond coat comprises a replacement bond coat or a repair bond coat, or a combination thereof.

### Claim 20 (depends on 8)

The coated article of claim 8, wherein X further comprises about 0.001 to about 1.25 percent germanium by weight of the alloy.