FARUQ, Muhammad; VILLESUZANNE, Antoine; SHAO, Guosheng

doi:10.1016/j.jnoncrysol.2018.02.016

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FARUQ, Muhammad
Institute for Renewable Energy and Environmental Technologies

VILLESUZANNE, Antoine
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institute for Renewable Energy and Environmental Technologies

SHAO, Guosheng
Institute for Renewable Energy and Environmental Technologies
UK-China Centre for Multi-functional Nanomaterials

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Ce document a été publié dans

Journal of Non-Crystalline Solids. 2018, vol. 487, p. 72-86

Elsevier

Résumé en anglais

Using Quantum Sutton-Chen potentials, Molecular Dynamics was used to obtain an atomistic description of melting, glass formation and crystallisation processes for palladium metal, metallic silicon and their alloys, from PdSi to Pd5Si. Glass formation and crystallisation were investigated using different cooling rates, by analysing the radial distribution function, enthalpy, density, volume, and diffusion coefficient. As expected, glass forms at high cooling rates, while crystallisation occurs at slower rates. The glass transition temperature was estimated from the Wendt-Abraham parameter vs temperature curves and the splitting of peaks in the radial distribution function. The effect of the Pd/Si ratio on the glass transition was studied by analysing the volume change during cooling of the Pd-Si alloys. The glass forming ability was found to increase with increasing Pd concentration in the alloys. Overall, our results reveal that Quantum Sutton-Chen potentials allow good descriptions of the melting, glass transition, and crystallisation during the heating and cooling processes.< Réduire

Mots clés en anglais

Quantum Sutton-Chen potentials

Liquid-glass transition

Metallic glass

Glass formation and crystallisation

Molecular dynamic simulation

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Molecular-dynamics simulations of binary Pd-Si metal alloys: Glass formation, crystallisation and cluster properties

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