# US 10,370,740 B2 · Nickel-based alloy

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- Number: US 10,370,740 B2
- Document ID: US10370740B2
- Status: Granted
- Kind: B2
- Application number: 15/741,700
- Filed: 2016-06-30
- Published: 2018-07-12
- Granted: 2019-08-06
- Earliest claimed: 2015-07-03
- Assignees: Oxford University Innovation Limited
- Applicants: Oxford University Innovation Limited
- Inventors: Roger Reed; Zailing Zhu; David Crudden
- Web page: https://patentgrep.com/patent/US10370740B2

## CPC

- C22C 19/056: {with the maximum Cr content being at least 10% but less than 20%}
- C22C 19/05: with chromium
- C30B 29/02: Elements
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C30B: SINGLE-CRYSTAL GROWTH (by using ultra-high pressure, e.g. for the formation of diamonds, B01J3/06); UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL (zone-refining of metals or alloys C22B); PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (casting of metals, casting of other substances by the same processes or devices B22D; working of plastics B29; modifying the physical structure of metals or alloys C21D, C22F); SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (for producing semiconductor devices or parts thereof H10); APPARATUS THEREFOR

## Abstract

A nickel-based alloy composition consisting, in weight percent, of: between 12.3 and 15.2% chromium, between 4.8 and 12.0% cobalt, between 2.5 and 8.3% tungsten, between 0.0 and 0.5% molybdenum, between 0.0 and 0.5% rhenium, between 3.5 and 6.7% aluminium, between 6.1 and 10.7% tantalum, between 0.0 and up to 0.5% hafnium, between 0.0 and 0.5% niobium, between 0.0 and 0.5% titanium, between 0.0 and 0.5% vanadium, between 0.0 and 0.1% silicon, between 0.0 and 0.1% yttrium, between 0.0 and 0.1% lanthanum, between 0.0 and 0.1% cerium, between 0.0 and 0.003% sulphur, between 0.0 and 0.05% manganese, between 0.0 and 0.05% zirconium, between 0.0 and 0.005% boron, between 0.0 and 0.01% carbon, the balance being nickel and incidental impurities.

## Claims

### Claim 1

A nickel-based alloy composition consisting, in weight percent, of: between 12.3 and 15.2% chromium, between 4.8 and 12.0% cobalt, between 2.5 and 8.3% tungsten, between 0.0 and 0.5% molybdenum, between 0.0 and 0.5% rhenium, between 3.5 and 6.7% aluminium, between 6.1 and 10.7% tantalum, between 0.0 and up to 0.5% hafnium, between 0.0 and 0.5% niobium, between 0.0 and 0.5% titanium, between 0.0 and 0.5% vanadium, between 0.0 and 0.1% silicon, between 0.0 and 0.1% yttrium, between 0.0 and 0.1% lanthanum, between 0.0 and 0.1% cerium, between 0.0 and 0.003% sulphur, between 0.0 and 0.05% manganese, between 0.0 and 0.05% zirconium, between 0.0 and 0.005% boron, between 0.0 and 0.01% carbon, the balance being nickel and incidental impurities.

### Claim 2 (depends on 1)

The nickel-based alloy composition according to claim 1, consisting, in weight percent, of between 12.3 and 14.7% chromium.

### Claim 3 (depends on 1)

The nickel-based alloy composition according to claim 1, consisting, in weight percent, of between 7.1 and 11.0% cobalt.

### Claim 4 (depends on 1)

The nickel-based alloy composition according to claim 1, consisting, in weight percent, of between 3.3 and 6.4% tungsten.

### Claim 5 (depends on 1)

The nickel-based alloy composition according to claim 1, consisting, in weight percent of, between 4.5 and 6.4% aluminium.

### Claim 6 (depends on 1)

The nickel-based alloy composition according to claim 1, consisting, in weight percent, of between 6.5 and 10.7% tantalum.

### Claim 7 (depends on 1)

The nickel-based alloy composition according to claim 1, consisting, in weight percent, of between 0.0 and 0.2% hafnium.

### Claim 8 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the sum of the elements cobalt and tungsten, in weight percent, is greater than 13.5%.

### Claim 9 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the sum of the elements cobalt, tungsten, rhenium and molybdenum, in weight percent, is greater than 13.5%.

### Claim 10 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the sum of the elements tungsten and tantalum, in weight percent, is less than 14.4%.

### Claim 11 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the sum of the elements aluminium and tantalum, in weight percent, is between 11.5 and 16.2%.

### Claim 12 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the following equation is satisfied in which WTa and WAl are the weight percent of tantalum and aluminium in the alloy respectively
33≤WTa+5.2WAl≤45.

### Claim 13 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the following equation is satisfied in which WTa, WAl, WTi, WNb and Wv are the weight percent of tantalum, aluminium, titanium, niobium and vanadium in the alloy respectively
4.2≤(WTa+WTi+WNb+Wv)−0.5WAl.

### Claim 14 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the following equation is satisfied in which WW, WMo, WRe and WCo are the weight percent of tungsten, molybdenum, rehenium and cobalt in the alloy respectively
15.2≤[1.26(WW+WMo+WRe)]+WCo.

### Claim 15 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the following equation is satisfied in which WTa and WW are the weight percent of tantalum and tungsten in the alloy respectively
12.7≥WTa+0.87WW.

### Claim 16 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the following equation is satisfied in which WCr and WW are the weight percent of chromium and tungsten in the alloy respectively
11.64≥WCr+0.179WW2−1.54WW.

### Claim 17 (depends on 1)

The nickel-based alloy composition according to claim 1, wherein the sum of the elements rhenium, molybdenum and tungsten, in weight percent, is at least 2.5%.

### Claim 18 (depends on 1)

The nickel-based alloy according to claim 1, wherein the sum of the elements niobium, titanium, vanadium and tantalum, in weight percent, is between 6.1 and 10.7%.

### Claim 19 (depends on 1)

The nickel-based alloy according to claim 1, consisting, in weight percent, of at least 0.1% molybdenum.

### Claim 20 (depends on 1)

A single crystal article formed of the nickel-based alloy composition of claim 1.