YTTRIUM AND YTTRIUM-SILICON BEARING NICKEL-BASE SUPERALLOYS ESPECIALLY USEFUL AS COMPATIBLE COATINGS FOR ADVANCED SUPERALLOYS

摘要

13DV-8334YTTRIUM AND YTTRIUM-SILICON BEARINGNICKEL-BASE SUPERALLOYS ESPECIALLY USEFUL ASCOMPATIBLE COATINGS FOR ADVANCED SUPERALLOYSAbstractThere is provided by the present inventionyttrium and yttrium-silicon bearing alloys which arechemically and mechanically compatible with advancednickel-base superalloys and nickel-base eutecticsuperalloys and which posses excellent resistance tohigh temperature oxidation. The alloys of theinvention are, therefore, particularly useful as aprotective environmental coatings for the externalsurfaces of hot-stage aircraft gas turbine enginecomponents, e.g., rotating blades and stationary vanes,made from such advanced superalloys.