Yttrium and yttrium-silicon bearing nickel-base superalloys espe

Details Yttrium and yttrium-silicon bearing nickel-base superalloys espe Yttrium and yttrium-silicon bearing nickel-base superalloys espe

1989-08-04

1991-08-27

Lechert, Jr., Stephen J.

Alloys or metallic compositions

Nickel base

Chromium containing

420445, 428614, 428680, 1062864, 1062865, C22C 1905

Patent

active

050431382

ABSTRACT:
There is provided by the present invention yttrium and yttrium-silicon bearing alloys which are chemically and mechanically compatible with advanced nickel-base superalloys and nickel-base eutectic superalloys and which posses excellent resistance to high temperature oxidation. The alloys of the invention are, therefore, particularly useful as a protective environmental coatings for the external surfaces of hot-stage aircraft gas turbine engine components, e.g., rotating blades and stationary vanes, made from such advanced superalloys.

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