Abstract
The glass transition temperature (Tgonset) and super-cooled liquid region (ΔTx) of Zr55Cu30Ni5Al10 metallic glass ribbon and bulk glassy plate have been measured using conventional and step-scan modulated temperature differential scanning calorimeter (MTDSC). A wide variation of Tgonset(±14.8 K) and ΔTx (±18.5 K) have been estimated using conventional DSC at heating rates of 5–400 K/min in the present study as well the data reported in the literature. We report that Tgonset can be precisely (±1.3 K) measured using step-scan MTDSC from the reversible heat flow curve, which excludes the structural relaxation near to glass transition.
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