Abstract
We investigate the thermal stability and kinetics ofCu65Hf35 bulk metallic glass (BMG).Cu65Hf35 glassy rods in diameter up to 2 mm are preparedby a conventional copper mould suction casting. Kinetics of glasstransition and crystallizations are investigated and the ideal glasstransition temperature of the alloy is obtained. It is found that thedependence of crystallization temperature of the BMG on the heatingrates follows the Vogel–Fulcher–Tammann (VFT) non-linear relationshiprather than the Kissinger and Lasocka linear fittings. The long-termthermal stability of the BMG is investigated by means of continuouscrystallization diagrams obtained from the extension of VFT analysis.It is suggested that ideal glass transition and crystallizationtemperatures can also be regarded as the long-term stability criteriaof the BMG.
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