scholarly journals Tuning pairwise potential can control the fragility of glass-forming liquids: from a tetrahedral network to isotropic soft sphere models

2016 ◽  
Vol 2016 (7) ◽  
pp. 074002 ◽  
Author(s):  
Misaki Ozawa ◽  
Kang Kim ◽  
Kunimasa Miyazaki
Keyword(s):  
Soft Sphere ◽  
Pairwise Potential ◽  
Glass Forming

Separation of Diffusive Jump Motion and Trapped Motion of Atoms in a Glass Forming Process Via Molecular Dynamics Simulation

1996 ◽  
Vol 455 ◽  
Author(s):  
J. Matsui ◽  
M. Fujisaki ◽  
T. Odagaki
Keyword(s):  
Molecular Dynamics ◽  
Md Simulation ◽  
Peak Frequency ◽  
Dynamics Simulation ◽  
Forming Process ◽  
Soft Sphere ◽  
Glass Forming ◽  
Two Peaks ◽  
Dynamical Order ◽  
Good Agreement

ABSTRACTWe have carried out the molecular dynamics (MD) simulation for a binary soft-sphere system and calculated the self part of the generalized susceptibility χs(q, ω) at various temperatures. At higher temperatures in liquid state, only one peak appears in the imaginary part of Xa, which tends to split into two peaks, the so-called α- and β- peaks, as the temperature is reduced. The temperature dependence of the peak frequency is well described by the Vogel-Fulcher law for the α- peak, and the peak frequency does not change much for the α- peak. We have also measured the trajectory volume of a tagged atom V(t), which is related to the dynamical order parameter, the “generalized capacity”, in structural glass transitions recently proposed by J. F. Douglas. These results show the transition temperature which is in good agreement with that determined by the trapping diffusion model.

scholarly journals Equilibration and aging of dense soft-sphere glass-forming liquids

2013 ◽  
Vol 87 (5) ◽  
Author(s):  
Luis Enrique Sánchez-Díaz ◽  
Pedro Ramírez-González ◽  
Magdaleno Medina-Noyola
Keyword(s):  
Soft Sphere ◽  
Glass Forming

Nonlinear active micro-rheology in a glass-forming soft-sphere mixture

2013 ◽  
Vol 138 (12) ◽  
pp. 12A512 ◽  
Author(s):  
D. Winter ◽  
J. Horbach
Keyword(s):  
Soft Sphere ◽  
Glass Forming

scholarly journals Density-Temperature-Softness Scaling of the Dynamics of Glass-Forming Soft-Sphere Liquids

2011 ◽  
Vol 107 (15) ◽  
Author(s):  
Pedro E. Ramírez-González ◽  
Leticia López-Flores ◽  
Heriberto Acuña-Campa ◽  
Magdaleno Medina-Noyola
Keyword(s):  
Soft Sphere ◽  
Glass Forming

Electron Microscopy of Silicon Nitride-Based Ceramics

1991 ◽  
Vol 49 ◽  
pp. 926-927
Author(s):  
Gareth Thomas
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Silicon Nitride ◽  
World Wide ◽  
Sintering Temperature ◽  
Liquid Phase Sintering ◽  
High Temperature Strength ◽  
Sintering Additives ◽  
Glass Forming ◽  
Dense Product

Silicon nitride and silicon nitride based-ceramics are now well known for their potential as hightemperature structural materials, e.g. in engines. However, as is the case for many ceramics, in order to produce a dense product, sintering additives are utilized which allow liquid-phase sintering to occur; but upon cooling from the sintering temperature residual intergranular phases are formed which can be deleterious to high-temperature strength and oxidation resistance, especially if these phases are nonviscous glasses. Many oxide sintering additives have been utilized in processing attempts world-wide to produce dense creep resistant components using Si3N4 but the problem of controlling intergranular phases requires an understanding of the glass forming and subsequent glass-crystalline transformations that can occur at the grain boundaries.

The effect of an aluminum heat-sink layer on the laser-induced amorphization of SiOx/TeGeSn/SiOx phase-change recording films

1989 ◽  
Vol 47 ◽  
pp. 574-575
Author(s):  
Matthew R. Libera ◽  
Martin Chen
Keyword(s):  
Thin Film ◽  
Phase Change ◽  
Heat Sink ◽  
Multilayer Film ◽  
Glassy Phase ◽  
Film Structure ◽  
Glass Forming ◽  
Active Storage ◽  
Dielectric Layers ◽  
Amorphous States

Phase-change erasable optical storage is based on the ability to switch a micron-sized region of a thin film between the crystalline and amorphous states using a diffraction-limited laser as a heat source. A bit of information can be represented as an amorphous spot on a crystalline background, and the two states can be optically identified by their different reflectivities. In a typical multilayer thin-film structure the active (storage) layer is sandwiched between one or more dielectric layers. The dielectric layers provide physical containment and act as a heat sink. A viable phase-change medium must be able to quench to the glassy phase after melting, and this requires proper tailoring of the thermal properties of the multilayer film. The present research studies one particular multilayer structure and shows the effect of an additional aluminum layer on the glass-forming ability.

Crystallization in Al 88 RE 8 Ni 4 glass-forming alloys

2002 ◽  
Vol 82 (12) ◽  
pp. 2483-2497 ◽  
Author(s):  
T. K. Croat ◽  
A. K. Gangopadhyay ◽  
K. F. K Elton
Keyword(s):  
Glass Forming

Study of the ?-Mechanical Relaxation in Molecular Glass-Forming Liquids

1997 ◽  
Vol 7 (11) ◽  
pp. 1635-1650 ◽  
Author(s):  
A. Faivre ◽  
L. David ◽  
J. Perez
Keyword(s):  
Mechanical Relaxation ◽  
Glass Forming ◽  
Molecular Glass
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