In this study, the local order and the structural evolution of the PdAg binary alloy system during the crystallization process from the amorphous phase under different pressures was investigated using the molecular dynamics simulation method. The structural development and phase transformation of the model alloy system for pressures of 0, 1, and 5 GPa are analysed based on variations of the radial distribution function, the bond orientational order parameters, and HoneycuttAndersen bond-type index method. The simulation results showed that higher pressures favoured amorphous-type atomic clusters and had an important effect on the bond orientational order parameters of the model system of the transformation from amorphous state to stable crystal phase during the isothermal annealing. PACS Nos.: 64.70.Q-, 64.70.kd, 64.70.kj, 64.70.P-.Résumé : Nous utilisons ici la méthode de simulation de dynamique moléculaire pour étudier l'ordre local et l'évolution structurelle d'alliages binaires PdAg pendant le processus de cristallisation à partir d'une phase amorphe sous différentes pressions. Le développement structurel et la transformation de phase, à des pressions de 0, 1 et 5 GPa, sont analysés sur la base des variations de la distribution radiale, des paramètres d'ordre orientationnel de lien et de la méthode de lien de HoneycuttAndersen. Les résultats de la simulation montrent que la haute pression favorise la phase amorphe et a un effet important sur les paramètres d'ordre orientationnel de lien dans ce modèle de la transformation d'une phase amorphe stable à une phase cristalline stable pendant le recuit isotherme. [Traduit par la Rédaction]
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