A criterion for the glass–liquid transition

Сандитов, Д. С.

doi:10.1016/j.jnoncrysol.2013.11.012

Cited by 16 publications

(18 citation statements)

References 9 publications

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“…5 Amorphous alloys of (Fe 71.2 B 24 Y 4.8 ) 96 Nb 4 have been prepared by fast cooling of the melt from the temperature range of 1573-1773 K. The melting temperature is 1410 K and the glass transition temperature 863 K [6]. All properties of this melt are described in Table 1 using (16)(17)(18)(19)(20) and assuming that scaling laws are followed and consequently a =1. All LLPT temperatures as well as the fraction of melting heat associated with these first-order transitions are predicted.…”

Section: -Applicationmentioning

confidence: 99%

“…The glass phase formation is often viewed as being due to a true thermodynamic transition. Various microscopic models and experiments prove its existence at T g [11][12][13][14][15][16][17][18][19][20][21][22]. The nucleation classical equation has been completed by introducing enthalpy savings  ls× H m and  gs ×H m , respectively associated with growth nucleus formation giving rise to crystallization in Phase 1 above T g and Phase 2 below T g , where H m is the melting heat per g-atom [22].…”

Section: -Introductionmentioning

confidence: 99%

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Glass phase and other multiple liquid-to-liquid transitions resulting from two-liquid phase competition

Tournier

2016

Chemical Physics Letters

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Melt supercooling leads to glass formation. Liquid-to-liquid phase transitions are observed depending on thermal paths. Viscosity, density and surface tension thermal dependences measured at heating and subsequent cooling show hysteresis below a branching temperature and result from the competition of two-liquid phases separated by an enthalpy difference depending on temperature. The nucleation classical equation of these phases is completed by this enthalpy saving existing at all temperatures. The glass phase thermodynamic parameters and their thermal variation have already been determined in such a two-liquid model. They are used at high temperatures to predict liquid-to-liquid transitions in some metallic glass-forming melts.

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Section: -Applicationmentioning

confidence: 99%

Section: -Introductionmentioning

confidence: 99%

Glass phase and other multiple liquid-to-liquid transitions resulting from two-liquid phase competition

Tournier

2016

Chemical Physics Letters

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“…Therefore it is timeconsuming to attain the thermodynamic equilibrium from the glass phase by relaxation. Various microscopic models prove the existence of a phase transition at T g [31][32][33][34][35][36][37][38][39][40]. Here, we only use thermodynamic relations without considering the microscopic aspects of the liquid-glass transformation.…”

Section: Introductionmentioning

confidence: 99%

4He glass phase: A model for liquid elements

Tournier

Bossy

2016

Chemical Physics Letters

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Abstract:The specific heat of liquid helium confined under pressure in nanoporous material and the formation, in these conditions, of a glass phase accompanied by latent heat are known. These properties are in good agreement with a recent model predicting, in liquid elements, the formation of ultrastable glass having universal thermodynamic properties. The third law of thermodynamics involves that the specific heat decreases at low temperatures and consequently the effective transition temperature of the glass increases up to the temperature where the frozen enthalpy becomes equal to the predicted value. The glass residual entropy is about 23.6% of the melting entropy. IntroductionThe solid-liquid transformation of bulk helium depends on the pressure p and temperature T [1-6]. The melting entropy is determined from the Clapeyron relation knowing the volume and melting temperature changes associated with the solid-to-liquid transformation under a pressure p [2]. The phase diagram is deeply modified when liquid helium is confined in 25Ǻ mean diameter nano-pore media under pressures p where 3.58 ≤ p≤ 5.27 MPa [7]. Early studies of these involved specific heat anomaly measurements and they were viewed as a consequence of the formation of localized Bose-Einstein condensates on nanometer length scales analogous to a solid [7]. The glass phase has since been discovered using measurements of the static structure factor, S(Q), of helium confined in the porous medium MCM-41 with pore diameter 47±1.5 Å. A similar amorphous S(Q) was also observed in 34 Å Gelsil [8]. The presence of an amorphous phase has been confirmed at higher pressures using porous Vycor glass [9]. In this work we consider that the supercooled liquid far below the melting temperature T m is condensed in a glass phase accompanied by an exothermic latent heat associated with a first-order transition.

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“…Any material in the liquid state can be passing through the glass transition process and be frozen into the glass state (amorphous) as long as it is under the appropriate cooling rate. [1][2][3][4] Although the essence of the glass transition still can not be really understood so far, the glass transition process has been used for production and in life service by people with a long history. Generally a glass transition denotes a transition from the equilibrium liquid state to a non-equilibrium solid state in a multibody system.…”

Section: Introductionmentioning

confidence: 99%

Study on the Glass Transition Process of Polymer System Using Differential Scanning Calorimetry and Fourier Transform Infrared Spectroscopy

Peng

Liu

et al. 2017

ANAL. SCI.

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The change in the infrared spectrum of polymer samples with temperature and their differential scanning calorimetry (DSC) experimental results are analyzed. According to the van't Hoff equation at constant pressure, the changes in the absorbance ratio corresponding to high and low vibrational states are calculated, and the apparent enthalpy differences of the vibration energy states transformation of the characteristic group can be obtained. From the experimental results, we can find that characteristic vibration modes of a chemical group in a polymer are under the influence of the glass transition process of the polymer with a different extent. The characteristic vibration modes of the same chemical group behave differently due to the influence of the polymer system at which the chemical moiety is situated.

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A criterion for the glass–liquid transition

Cited by 16 publications

References 9 publications

Glass phase and other multiple liquid-to-liquid transitions resulting from two-liquid phase competition

Glass phase and other multiple liquid-to-liquid transitions resulting from two-liquid phase competition

4He glass phase: A model for liquid elements

Study on the Glass Transition Process of Polymer System Using Differential Scanning Calorimetry and Fourier Transform Infrared Spectroscopy

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