Kinetic nature of hard magnetic Nd_(50)Al_(15)Fe_(15)Co_(20) bulk metallic glass with distinct glass transition

摘要

A hard magnetic Nd_(50)Al_(15)Fe_(15)Co_(20) bulk metallic glass (BMG) was prepared in the shape of a rod up to 3 mm in diameter by suction casting. The glass transition and crystallization behaviors as well as their kinetic nature have been studied. In contrast to the previously reported hard magnetic Nd-Al-Fe-Co BMGs, Nd_(50)Al_(15)Fe_(15)Co_(20) as-cast rod exhibits a distinct glass transition and multistep crystallization behaviors in the differential scanning calorimetry traces and lower coercivity. The BMG provides an ideal model for the investigation of glass transition and crystallization of hard magnetic Nd-Al-Fe-Co glass-forming alloys.