Paper Title:
Molecular Dynamics Study on Structural Relaxation of Metallic Glasses
  Abstract

Structural relaxation process in the Zr-Cu metallic glasses is investigated by using molecular dynamics simulations. The enthalpy change in isothermal annealing of the glassy state cannot be fitted by a simple exponential function but obeys a stretched exponential function, which indicates that the relaxation in glassy phase is not a single Debye type process. A close examination of individual atomic motion reveals that the enthalpy relaxation is related to a string-like cooperative motion of atoms. The analysis of the local symmetry around each atom shows that a network of the icosahedral clusters grows in the glassy phases during annealing and it closely relates to the free-volume annihilation in the structural relaxation.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
1648-1652
DOI
10.4028/www.scientific.net/MSF.638-642.1648
Citation
M. Shimono, H. Onodera, "Molecular Dynamics Study on Structural Relaxation of Metallic Glasses", Materials Science Forum, Vols. 638-642, pp. 1648-1652, 2010
Online since
January 2010
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