Theory of crystal nucleation of glass‐forming liquids: Some new developments

2021 ◽  
Author(s):  
Jürn W. P. Schmelzer ◽  
Timur V. Tropin
Keyword(s):  
Crystal Nucleation ◽  
New Developments ◽  
Glass Forming

Crystal nucleation rates in glass-forming molecular liquids: D-sorbitol, D-arabitol, D-xylitol, and glycerol

2018 ◽  
Vol 149 (5) ◽  
pp. 054503 ◽  
Author(s):  
Chengbin Huang ◽  
Zhenxuan Chen ◽  
Yue Gui ◽  
Chenyang Shi ◽  
Geoff G. Z. Zhang ◽  
...  
Keyword(s):  
Crystal Nucleation ◽  
Molecular Liquids ◽  
Glass Forming

The effect of heterogeneous structure of glass-forming liquids on crystal nucleation

2017 ◽  
Vol 462 ◽  
pp. 32-40 ◽  
Author(s):  
Alexander S. Abyzov ◽  
Vladimir M. Fokin ◽  
Nikolay S. Yuritsyn ◽  
Alisson Mendes Rodrigues ◽  
Jürn W.P. Schmelzer
Keyword(s):  
Crystal Nucleation ◽  
Heterogeneous Structure ◽  
Glass Forming

Crystal nucleation in glass-forming liquids: Variation of the size of the “structural units” with temperature

2016 ◽  
Vol 447 ◽  
pp. 35-44 ◽  
Author(s):  
Vladimir M. Fokin ◽  
Alexander S. Abyzov ◽  
Edgar D. Zanotto ◽  
Daniel R. Cassar ◽  
Alisson M. Rodrigues ◽  
...  
Keyword(s):  
Crystal Nucleation ◽  
Structural Units ◽  
Glass Forming

scholarly journals Demonstration of the effect of stirring on nucleation from experiments on the International Space Station using the ISS-EML facility

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
A. K. Gangopadhyay ◽  
M. E. Sellers ◽  
G. P. Bracker ◽  
D. Holland-Moritz ◽  
D. C. Van Hoesen ◽  
...  
Keyword(s):  
Fluid Flow ◽  
International Space Station ◽  
Space Station ◽  
Electromagnetic Levitation ◽  
Variable Density ◽  
Crystal Nucleation ◽  
Microgravity Environment ◽  
International Space ◽  
Glass Forming ◽  
Flux Model

AbstractThe effect of fluid flow on crystal nucleation in supercooled liquids is not well understood. The variable density and temperature gradients in the liquid make it difficult to study this under terrestrial gravity conditions. Nucleation experiments were therefore made in a microgravity environment using the Electromagnetic Levitation Facility on the International Space Station on a bulk glass-forming Zr57Cu15.4Ni12.6Al10Nb5 (Vit106), as well as Cu50Zr50 and the quasicrystal-forming Ti39.5Zr39.5Ni21 liquids. The maximum supercooling temperatures for each alloy were measured as a function of controlled stirring by applying various combinations of radio-frequency positioner and heater voltages to the water-cooled copper coils. The flow patterns were simulated from the known parameters for the coil and the levitated samples. The maximum nucleation temperatures increased systematically with increased fluid flow in the liquids for Vit106, but stayed nearly unchanged for the other two. These results are consistent with the predictions from the Coupled-Flux model for nucleation.

The Effect of Solute on the homogeneous Crystal Nucleation Frequency in Metallic Melts

1981 ◽  
Vol 9 ◽  
Author(s):  
C.V. Thompson ◽  
F. Spaepen
Keyword(s):  
Regular Solution Model ◽  
Solute Concentration ◽  
Crystal Nucleation ◽  
Qualitative Comparison ◽  
Glass Forming ◽  
Nucleation Frequency ◽  
Homogeneous Crystal ◽  
Complete Calculation ◽  
Metallic Melts ◽  
Approximate Expressions

ABSTRACTWe have made a complete calculation that extends the classical theory for crystal nucleation in pure melts to binary alloys. Using a regular solution model, we have developed approximate expressions for the free energy change upon crystallization as a function of solute concentration. They are used, together with model-based estimates of the interfacial tension, to calculate the nucleation frequency. The predictions of the theory for the maximum attainable undercooling are compared with existing experimental results for non-glass forming alloys. The theory is also applied to several easy glass-forming alloys (Pd-Si, Au-Si, Fe-B) for qualitative comparison with the present experimental experience on the ease of glass formation, and for assessment of the potential for formation of the glass in bulk.

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