Thermodynamic behavior of glass-forming metallic supercooled liquids

2013 ◽  
Vol 426 ◽  
pp. 1-5 ◽  
Author(s):  
M.B. Tang ◽  
J.T. Zhao
Keyword(s):  
Supercooled Liquids ◽  
Thermodynamic Behavior ◽  
Glass Forming

A Phenomenological Description of the PALS Response in Glass - Forming Systems

2008 ◽  
Vol 607 ◽  
pp. 48-52 ◽  
Author(s):  
Josef Bartoš
Keyword(s):  
Order Parameter ◽  
Positron Annihilation Spectroscopy ◽  
Supercooled Liquids ◽  
Phenomenological Description ◽  
Plateau Region ◽  
Glass Forming ◽  
Disordered Phase ◽  
Close Relationship ◽  
Temperature Plateau ◽  
Condensed Systems

A phenomenological description of the ortho-positronium (o-Ps) response from positron annihilation spectroscopy (PALS) and the dynamics from viscosity studies on two typical glass-forming compounds within the framework of the two-order parameter (TOP) model is presented. The dynamical data are accounted for by the modified Vogel – Fulcher – Tamman - Hesse (M-VFTH) equation. Subsequently, the quasi-sigmoidal course of the o-Ps lifetime, τ3, with or without the high-temperature plateau region as a function of the temperature over a wide temperature range can be described by an effective free volume version of the TOP model. This simultaneous description suggests a close relationship between the PALS response and the dynamics of supercooled liquids and seems to support the liquid - like and solid - like domain physical picture of all the three physical states of the disordered phase of the condensed systems.

Retracted Article: Atomic-scale simulation to study the dynamical properties and local structure of Cu–Zr and Ni–Zr metallic glass-forming alloys

2016 ◽  
Vol 18 (10) ◽  
pp. 7169-7183 ◽  
Author(s):  
M. H. Yang ◽  
Y. Li ◽  
J. H. Li ◽  
B. X. Liu
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Metallic Glasses ◽  
Local Structure ◽  
Supercooled Liquids ◽  
Atomic Scale ◽  
Dynamics Simulation ◽  
Glass Forming ◽  
Retracted Article ◽  
Dynamical Properties

Molecular dynamics simulation with well-developed EAM potentials was carried out to investigate the transport properties and local atomic structure of Cu–Zr and Ni–Zr metallic glasses and supercooled liquids.

Correlation between the fragility of supercooled liquids and thermal expansion in the glassy state for Gd-based glass-forming alloys

2007 ◽  
Vol 19 (11) ◽  
pp. 116103 ◽  
Author(s):  
Jing Guo ◽  
Xiufang Bian ◽  
Yan Zhao ◽  
Shijiao Zhang ◽  
Taibao Li ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Glassy State ◽  
Supercooled Liquids ◽  
Glass Forming

Glass-Forming Liquids in Mesopores Probed by Solvation Dynamic and Dielectric Techniques

1996 ◽  
Vol 464 ◽  
Author(s):  
X. Yan ◽  
C. Streck ◽  
R. Richert
Keyword(s):  
Slow Component ◽  
Supercooled Liquids ◽  
Bulk Liquid ◽  
Low Molecular Weight ◽  
Solvation Dynamics ◽  
Dielectric Relaxation Spectroscopy ◽  
Glass Forming ◽  
Heterogeneous Samples ◽  
Liquid Dynamics ◽  
Dielectric Results

ABSTRACTThe orientational dynamics of organic supercooled liquids of low molecular weight confined to the geometry of porous glasses are studied by two highly related techniques, the optical method of probing the dynamics of solvation regarding a chromophoric host molecule and dielectric relaxation spectroscopy. The dielectric results display marked effects of the confinement to mesopores in terms of altered structural dynamics which appear to separate into a raster and slower responses relative to the bulk liquid. We also demonstrate that there is no trivial relation between the ε*(ω) data and the liquid dynamics in these heterogeneous samples. These effects are partially paralleled by the solvation dynamics results, but with the spatial range inherent in the optical technique being inconsistent with associating the fast and slow dynamical components to spatially distinct regimes. We conclude on the slow component being a signature of non-ergodicity which arises from the competition between the length scale of cooperativity and the pore size.

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