Al2O3/FeAl interfacial behaviors by yttrium doping in high temperature oxidation

FeAl coatings with yttrium (Y) doping were prepared at 600 °C on pure iron. The anti-flaking properties of Al2O3-oxide films at 1000 °C oxidation was improved significantly by Y doping in FeAl coatings. The spallation was 0.47 mg/cm2 for 200 h of oxidation and only ~1/6 of that without Y. The first principle calculation results demonstrate that the interfacial bond strength were enhanced with Y doping, that is because Y substituted primarily in...