Oxidation and SRZ resistant coatings on nickel superalloys
AssigneePratt & Whitney Canada Corp.
InventorJoël Larose
Life of this patent
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Abstract
An article has a nickel-based alloy substrate having, in weight percent: 5.4-7.4 Re; 4.1-5.9 Ru; 3.0-6.2 Cr; 3.0-10.0 Co; 0.5-3.8 Mo; 3.0-6.0 W; 4.6-8.6 Ta; 5.0-6.4 Al; 0.050-0.30 Hf; no more than 0.50 all other elements, if any, individually; and no more than 2.0 all other elements, if any, combined. A nickel-based coating is on the substrate and comprising, in weight percent: 6.0-10.0 Al; 4.0-15.0 Cr; 11.0-15.0 Co; 0.1-1.0 Hf; 0.1-1.0 Si; 0.1-1.0 Y; up to 1.0 Zr if any; up to 7.0 Ta if any; up to 6.0 W if any; no more than 1.0 all other elements, if any, individually; and no more than 4.0 all other elements, if any, combined.
Claims21
An article comprising:
- a nickel-based alloy substrate consisting of, in weight percent:
- 6.2-6.6 Re;
- 4.7-5.2 Ru;
- 4.1-5.1 Cr;
- 5.3-6.8 Co;
- 0.9-2.7 Mo;
- 3.8-5.2 W;
- 5.4-7.9 Ta;
- 5.5-6.1 Al;
- 0.050-0.15 Hf;
- no more than 0.50 all other elements, if any, individually;
- and
- no more than 2.0 all other elements, if any, combined;
- and
- a nickel-based coating or layer thereof on the substrate consisting of, in weight percent:
- 6.0-8.0 Al;
- 4.0-6.0 Cr;
- 9.0-15.0 Co;
- 0.1-1.0 Hf;
- 0.1-1.0 Si;
- 0.1-1.0 Y;
- up to 1.0 Zr if any;
- 5.0-7.0 Ta;
- 4.0-6.0 W;
- no more than 0.50 all other elements, if any, individually;
- and
- no more than 2.0 all other elements, if any, combined.
Dependencies are inferred from the claim text.