Crystallization behaviours around the glass transition temperature in an amorphous Fe-Nb-B alloy

摘要

Crystallization behaviours around the glass transition temperature in an amorphous Fe_(70)Nb_(10)B_(20) alloy were investigated by means of transmission electron microscopy. Dense bcc-Fe nanocrystals initially appeared as the primary phase, followed by the dense formation of the (Fe,Nb)_(23)B_6 nanocrystalline phase. The bcc-Fe nanocrystals were formed even by annealing at a temperature that is 38 K lower than the glass transition temperature. A difference of the low temperature behaviours between the present conventional amorphous alloy and a bulk metallic glass was discussed.