Metallic bondcoat with a high γ/γ' transition temperature and a component
View Patent ↗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.
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 .