Materials for Special Environments Division,CAS Key Laboratory of Nuclear Materials and Safety Assessment,Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;
School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;
Fe-Cr-Al ODS alloy; Direct oxidation; Iron oxide layer; Y-Al-O nanoparticles; Formation mechanism;