Patent ID: 8025984

Claim:
A protective alloy layer for protecting a component against corrosion and oxidation at high temperatures, comprising: 0.5 to 2% rhenium (% by weight); 16 to 18% chromium (% by weight); 24 to 26% cobalt (% by weight); 9 to 11.5% aluminum (% by weight); 0.05 to 0.7% yttrium (% by weight) or a metal selected from the group consisting of: scandium and the rare earth elements; 0.0 to 1% ruthenium (% by weight); remainder nickel and manufacturing related impurities; and wherein the protective layer contains at most 6% by volume of chromium-rhenium precipitates, and the concentration of cobalt relative to the concentration of the other elements in the alloy suppresses the formation of a ý phase of the alloy thereby avoiding a peak in a coefficient of thermal expansion of the alloy.