Thermal processing and enthalpy storage of an amorphous solid: a molecular dynamics study
arXiv:1704.07301 · doi:10.1557/jmr.2017.251
Abstract
Using very long molecular dynamics simulation runs, temperature protocols spanning up to five orders of magnitude in time-scales are performed to investigate thermally activated structural relaxation in a model amorphous solid. The simulations demonstrate significant local structural excitations as a function of increasing temperature and show that enthalpy rather than energy is primarily responsible for relaxation. The observed enthalpy changes are of the order seen in experiment, and can be correlated with the level of internal hydrostatic stress homogenization and icosahedral content within the solid.
arXiv comment19 pages, 7 figures
References in corpus (16)
- Dynamics of Viscoplastic Deformation in Amorphous Solids
- String-like Clusters and Cooperative Motion in a Model Glass-Forming Liquid
- Event-based relaxation of continuous disordered systems
- Deformation and Failure of Amorphous Solidlike Materials
- Crossover to Potential Energy Landscape Dominated Dynamics in a Model Glass-forming Liquid
- Strain localization and percolation of stable structure in amorphous solids
- Local elasticity map and plasticity in a model Lennard-Jones glass
- Modeling the mechanics of amorphous solids at different length and time scales
- Subextensive Scaling in the Athermal, Quasistatic Limit of Amorphous Matter in Plastic Shear Flow
- Traveling through potential energy landscapes of disordered materials: the activation-relaxation technique
- Continuum limit of amorphous elastic bodies (III): Three dimensional systems
- Inhomogeneous elastic response of silica glass
- Particle rearrangements during transitions between local minima of the potential energy landscape of a supercooled Lennard-Jones liquid
- Evolution of the potential-energy surface of amorphous silicon
- Particle jumps in structural glasses
- Local structural excitations in model glasses