Metallic bondcoat with a high γ/γ' transition temperature and a component

Patent metadata

Field	Value
Publication number	US-9856545-B2
Application number	US-201514725809-A
Country	US
Kind code	B2
Filing date	May 29, 2015
Priority date	Mar 23, 2010
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A metallic coating or alloy is provided. The metallic coating or alloly includes iron, chromium, aluminum, tantalum, and nickel and contains no rhenium. The presence of tantalum and iron and the absence of rhenium are effective to increase a γ/γ′ transition temperature of the alloy. A component including the metallic coating or alloy is also provided.

First claim

What we claim is:

1. A nickel-based metallic alloy, which contains γ and γ′ phases consisting of:
iron in an amount of between 0.5 wt % to 5 wt %;
chromium in an amount of between 12 wt % and 16 wt %; and
aluminum in an amount of at least 1 wt %;
tantalum in an amount of at least 1 wt %; and
remainder nickel.

2. The metallic alloy according to claim 1 , wherein the amount of iron is between 1 wt %-4 wt %.

3. The metallic alloy according to claim 2 , wherein the amount of iron is 2.7%.

4. The metallic alloy according to claim 1 , wherein the amount of tantalum is between 4 wt % and 8 wt %.

5. The metallic alloy according to claim 1 , wherein the amount of chromium is 14.4 wt %.

6. The metallic alloy according to claim 1 , wherein the amount of aluminum is between 7 wt %-8 wt %.

7. The metallic alloy according to claim 6 , wherein the amount of aluminum is 7.75 wt %.

8. The metallic alloy according to claim 1 , wherein the alloy has a higher γ′/γ transition temperature compared to NiCoCrAlY alloy or a coating with rhenium and without iron and/or without tantalum.

9. A component, comprising:
a metallic alloy according to claim 1 .

10. A component, comprising:
a metallic coating consisting of an alloy as claimed in claim 1 .

Assignees

• Siemens Ag

Inventors

• Kulkarni Anand A
• Shipper Jr Jonathan E
• Stamm Werner

Classifications

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• C22C30/00

  Alloys containing less than 50% by weight of each constituent · CPC title

• Y02T50/67

  Cross-Sectional Technologies · mapped topic

• C23C4/073

  containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements · CPC title

• C22C19/056 Primary

  with the maximum Cr content being at least 10% but less than 20% · CPC title