Thermal stability of nano-sized oxide particles and grain size in mechanically alloyed Fe-Crbased ferritic alloys

摘要

Recent advances in nanocrystalline materials with outstanding properties requirehigh-temperature stability, particularly in future fission reactors. Mechanical alloying such as high-energy ballmilling can produce nanocrystalline materials with grain size less than 100 nm. Nano-grains can still bemaintained after a subsequent high temperature annealing. In this study, the thermal stability of nanostructuredFe-Cr alloys with different annealing temperature (900-1200°C) has been evaluated. Microstructural evolutionwas investigated using channeling contrast FIB imaging, TEM and SAXS.