Kinetics of Structural Relaxations in a Two-Dimensional Model Atomic Glass. 3
Abstract
The kinetics of structural relaxation in a two-dimensional model atomic glass quenched infinitely rapidly from the melt to 0.55 of the glass transition temperature was simulated by the molecular dynamics method to study the chronological ordering of the atomic kinematics associated with such relaxations. Over the very short periods of aging (c.a. 200 atomic fluctuations) accessible to the MD method, a Williams-Watts form of relaxation with a fractional exponent of 0.5 was found to hold for excess enthalpy, free volume, and site distortion parameter. The distribution of free energy barriers associated with this relaxation that resulted from the analysis could be scaled up to describe processes occurring on macroscopic time scales, and agrees well with experimental results in CuxZr1-x glasses. Results on the clustering of relaxations and other topological features of the relaxation process are also reported. Copper compounds, Zirconium.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 1988
- Accession Number
- ADA199080
Entities
People
- Ali S. Argon
- Derguo Deng
- Sidney Yip
Organizations
- Massachusetts Institute of Technology