Journal of Physical Chemistry & Biophysics
Open Access

Fragility of metallic liquids manifest in the high temperature structure and cohesive energy

4^th International Conference on Physical and Theoretical Chemistry

September 18-19, 2017 Dublin, Ireland

Anup K Gangopadhyay

Washington University in St. Louis, USA

Scientific Tracks Abstracts: J Phys Chem Biophys

Abstract :

Glasses are traditionally classified as fragile or strong depending on the rates of change of dynamical properties (viscosity, diffusion coefficient) with temperature near the glass-transition temperature. It will be shown that the temperature dependence of viscosity far above the liquidus is an equally good measure of fragility. From the measurements of liquid structures of a large number of metallic glass-forming liquids using the electrostatic levitation (ESL) technique, combined with synchrotron X-rays, it will be demonstrated that the rates of structural changes of equilibrium and super cooled (metastable liquid below the liquidus) liquids with temperature are intimately connected with the liquid/glass fragilities. A strong connection between fragilities and average cohesive energies for metallic liquids will also be demonstrated.

Biography :

Anup K Gangopadhyay is working as a Research Scientist at Washington University in St. Louis, USA.