Patent ID: 7338719

Claim:
An MCrAl layer for a turbine blade or vane comprising a microporous aluminum oxide layer arranged on the MCrAl layer, wherein M is selected from the group consisting of: Fe, Co, and Ni: wherein the MCrAl layer includes at least one element selected from a first group consisting of yttrium, cerium, scandium, lanthanum, and other lanthanides having a total concentration of the first group elements in the range from 0.02% to 1% by weight; and at least one element selected from a second group consisting of hafnium, zirconium, and titanium having a total concentration of the second group elements in the range from 0.02% to 1% by weight; and at least one element selected from a third group consisting of carbon and nitrogen having a total concentration of the third group elements in the range from 0.005% to 0.2% by weight; wherein the microporous aluminum oxide layer contains pores having diameters in the range of 10-800 nanometers.