# US 2025/0084508 A1 · Nickel-based superalloy, single-crystal guide vane and turbine engine

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- Number: US 2025/0084508 A1
- Document ID: US20250084508A1
- Status: Published application
- Kind: A1
- Application number: 18/576,986
- Filed: 2022-07-05
- Published: 2025-03-13
- Earliest claimed: 2021-07-07
- Assignees: Safran
- Applicants: Safran
- Inventors: Jérémy RAME; Edern MENOU
- Web page: https://patentgrep.com/patent/US20250084508A1

## CPC

- C22C 19/056: {with the maximum Cr content being at least 10% but less than 20%}
- F01D 5/28: Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion
- F05D 2300/175: Superalloys
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- 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

## Abstract

A nickel-based superalloy including in weight percentages: 5.0 to 6.5% aluminium, 0.50 to 2.5% tantalum, 1.50 to 4.0% titanium, 0 to 7.0% cobalt, 12.0 to 16.0% chromium, 0.50 to 2.5% molybdenum, 0 to 2.0% tungsten, 0.05 to 0.15% hafnium, 0 to 0.15% silicon, the remainder consisting of nickel and unavoidable impurities. A single-crystal blade including such an alloy and to a turbomachine including such a blade.

## Claims

### Claim 1

A nickel-based superalloy comprising, in weight percentages: 5.25 to 6.25% aluminium, 0.50 to 2.0% tantalum, 2.5 to 3.5% titanium, 0 to 7.0% cobalt, 12.5 to 15.5% chromium, 0.50 to 2.5% molybdenum, 0 to 2.0% tungsten, 0.05 to 0.15% hafnium, 0 to 0.15% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 2 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.5% aluminium, 10% tantalum, 3.0% titanium, 14.0% chromium, 2.0% molybdenum, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 3 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.75% aluminium, 1.5% tantalum, 3.0% titanium, 4.0% cobalt, 14.0% chromium, 1.5% molybdenum, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 4 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 6.0% aluminium, 1.0% tantalum, 3.0% titanium, 6.0% cobalt, 14.0% chromium, 1.0% molybdenum, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 5 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.5% aluminium, 1.5% tantalum, 3.0% titanium, 15.0% chromium, 1.0% molybdenum, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 6 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.5% aluminium, 1.5% tantalum, 3.0% titanium, 13.0% chromium, 2.0% molybdenum, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 7 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.75% aluminium, 1.5% tantalum, 3.0% titanium, 4.0% cobalt, 13.0% chromium, 1.5% molybdenum, 1.0% tungsten, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 8 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.5% aluminium, 1.75% tantalum, 2.5% titanium, 15.0% chromium, 1.0% molybdenum, 0.50% tungsten, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 9 (depends on 1)

The superalloy according to claim 1, comprising in weight percentages: 5.5% aluminium, 1.5% tantalum, 3.0% titanium, 15.0% chromium, 1.0% molybdenum, 0.50% tungsten, 0.10% hafnium, 0.10% silicon, 0 to 2 ppm sulfur, the remainder consisting of nickel and unavoidable impurities.

### Claim 10 (depends on 1)

A single-crystal blade for a turbomachine, comprising a superalloy according to claim 1.

### Claim 11 (depends on 10)

The blade according to claim 10, comprising a protective coating comprising a metal sublayer deposited on the superalloy and a ceramic thermal barrier deposited on the metal sublayer.

### Claim 12 (depends on 10)

The blade according to claim 10, having a structure oriented in a <001> crystallographic direction.

### Claim 13 (depends on 10)

A turbomachine comprising a blade according to claim 10.