Patent ID: 8708646

Claim:
A MCrAlY alloy, comprising (in wt%): an M-based metallic substrate configured to define part of a honeycomb seal; Cr and Al and Y material applied to the substrate; and a diffusion zone within the M-based metallic substrate and comprising MCrAlY formed by diffusion of the Cr and Al and Y into the substrate, the MCrAlY comprising; 18% - 35% chromium (Cr); 3% - 15% aluminum (Al); and 0.2% - 2% yttrium (Y), wherein M is iron (Fe)-, wherein the MCrAlY alloy comprises at least a first effective amount of hafnium (Hf) for enhancing an oxidation behavior of the alloy and/or at least a second effective amount of silicon (Si) for enhancing an oxidation behavior of the MCrAlY alloy.