Berlin 2015 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 8: Liquid and Amorphous Metals II: Structure Formation in Metallic Glasses
MM 8.2: Vortrag
Montag, 16. März 2015, 12:00–12:15, H 0107
Non-isothermal crystallization kinetics of metallic glass by differential fast scanning calorimetry — •Bin Yang1, Yulai Gao2, and Christoph Schick1 — 1AG Polymer Physics, Institute of Physics, University of Rostock, Germany — 2School of Materials Science and Engineering, Shanghai University, Shanghai, P.R. China
The thermal stability and the kinetic fragility of Al86Ni6Y4.5Co2La1.5 (%wt.) metallic glass were investigated by ultra-fast non-isothermal thermal analysis. The differential fast scanning calorimeter (DFSC) traces revealed that the material undergoes a three-stage crystallization for heating rates ranged from 5 to 40,000 K/s. Combining DSC and DFSC, the kinetics of the glass transition and crystallization of Al86Ni6Y4.5Co2La1.5 metallic glass was investigated. The kissinger plot can express the temperature dependence of growth rate of this metallic glass. Furthermore, the kinetic fragility for Al86Ni6Y4.5Co2La1.5 metallic glasses is evaluated. Depending on the fragility index, this metallic glass is a liquid of very high fragility, similar to several organics.