Part comprising a coating on a superalloy metal substrate, the coating including a metal underlayer

Patent metadata

Field	Value
Publication number	US-9546566-B2
Application number	US-201214114680-A
Country	US
Kind code	B2
Filing date	Apr 24, 2012
Priority date	Apr 29, 2011
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

The invention relates to a part comprising a coating on a superalloy metal substrate, the coating comprising a metal underlayer covering said substrate, the part being characterized in that said metal underlayer contains a base of nickel aluminide and also contains 0.5 at % to 0.95 at % of one or more stabilizer elements M from the group formed by Cu and Ag for stabilizing the gamma and gamma prime phases.

First claim

The invention claimed is:

1. A part comprising a coating on a superalloy metal substrate, the coating comprising a metal underlayer covering the substrate,
wherein the metal underlayer comprises a base of nickel aluminide and 0.5 at % to 0.95 at % of Ag for stabilizing gamma and gamma prime phases.

2. The part according to claim 1 , wherein the metal underlayer further comprises Cu in the range from 0.5 at % to 0.95 at %.

3. The part according to claim 1 , wherein the metal underlayer further comprises a platinum group element in the range from 2 at % to 30 at % to form a metal underlayer with an NiPtAl type base.

4. The part according to claim 1 , wherein the metal underlayer further comprises at least one reactive element selected from the group consisting of a reactive element of a rare earth type: Hf, Zr, Y, Sr, Ce, La, Yb, Er, and a reactive element Si, wherein each reactive element has a content of from 0.05 at % to 0.25 at %.

5. The part according to claim 1 , wherein the metal underlayer farther comprises, as a reactive element: 0.05 at %≦Hf≦0.2 at %, 0.05 at %≦Y≦0.2 at %, 0.05 at %≦Si≦0.25 at %, or a combination thereof.

6. The part according to claim 1 , wherein the metal underlayer comprises:
an NiPtAl type base;
as reactive element 0.08 at %≦Hf≦0.20 at %, 0.10 at %≦Y≦0.20 at %, 0.15 at %≦Si≦0.25 at %, or a combination thereof,
wherein the Ag content is from 0.75 at % to 0.9 at %.

7. The part according to claim 1 , wherein the metal substrate is made of a nickel-based superalloy.

8. The part according to claim 1 , wherein the coating farther comprises a layer of ceramic covering the metal underlayer.

9. The part according to claim 1 , forming a turbine part for a turbine engine.

10. The part according to claim 1 , constituting a turbine engine blade or vane.

11. The part according to claim 1 , wherein the metal underlayer comprises 0.6 at % to 0.9 at % of Ag.

12. The part according to claim 1 , wherein the metal underlayer comprises 0.7 at % to 0.85 at % of Ag.

13. The part according to claim 1 , wherein the metal underlayer further comprises at least one platinum group element.

14. The part according to claim 1 , wherein the metal underlayer has a thickness of less than 20 μm.

15. The part according to claim 1 , wherein the metal underlayer has a thickness of less than 15 μm.

16. The part according to claim 1 , wherein the metal underlayer further comprises at least one element selected from the group consisting of platinum, chromium, palladium, ruthenium, iridium, osmium and rhodium.

17. The part according to claim 1 , wherein the metal underlayer further comprises at least one element selected from the group consisting of zirconium, cerium, lanthanum, strontium, hafnium, silicon, ytterbium, erbium and yttrium.

18. A method of preparing the part according to claim 1 , comprising coating the superalloy metal substrate with the coating.

Assignees

• Guedou Jean-Yves
• Boidot Mathieu
• Estournes Claude
• Monceau Daniel
• Oquab Djar
• Selezneff Serge
• Snecma
• Centre Nat Rech Scient

Inventors

• Guedou Jean-Yves
• Boidot Mathieu
• Estournes Claude
• Monceau Daniel
• Oquab Djar
• Selezneff Serge

Classifications

• C23C10/00

  Solid state diffusion of only metal elements or silicon into metallic material surfaces · CPC title

• C23C28/3455

  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 · CPC title

• Y10T428/12618

  Plural oxides · CPC title

• C23C10/60

  After-treatment · CPC title

• C23C30/00

  Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title