R. Tournier
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View article: NiTi2, a New Liquid Glass
NiTi2, a New Liquid Glass Open
Many endothermic liquid–liquid transitions, occurring at a temperature Tn+ above the melting temperature Tm, are related to previous exothermic transitions, occurring at a temperature Tx after glass formation below Tg, with or without atta…
View article: Multiple Glass Transitions in Bismuth and Tin beyond Melting Temperatures
Multiple Glass Transitions in Bismuth and Tin beyond Melting Temperatures Open
Liquid-liquid transitions were discovered above the melting temperature (Tm) in Bi and Sn up to 2 Tm, viewed as glass transitions at Tg = Tn+ > Tm of composites nucleated at Tx < Tm and fully melted at Tn+. A glassy fraction (f) disappeare…
View article: Multiple Glass Transitions in Bismuth and Tin beyond Melting Temperatures
Multiple Glass Transitions in Bismuth and Tin beyond Melting Temperatures Open
Liquid-liquid transitions were discovered above the melting temperature (Tm) in Bi and Sn up to 2Tm and viewed as glass transitions at Tg = Tn+ > Tm of composites nucleated at Tx < Tm and fully melted at Tn+. A glassy fraction (f) disappea…
View article: Possible high temperature superconducting transitions in disordered graphite obtained from room temperature deintercalated KC$_8$
Possible high temperature superconducting transitions in disordered graphite obtained from room temperature deintercalated KC$_8$ Open
Although progress with twisted graphene nano-devices is boosting the superconductivity that is the consequence of their Moiré flat electronic bands, the immense choice for future development is an obstacle for their optimisation. We report…
View article: Liquid-Liquid Transitions due to Melting Temperatures of Residual Glassy Phases Expected in Pt57Cu23P20
Liquid-Liquid Transitions due to Melting Temperatures of Residual Glassy Phases Expected in Pt57Cu23P20 Open
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View article: Multiple Melting Temperatures in Glass-Forming Melts
Multiple Melting Temperatures in Glass-Forming Melts Open
All materials are vitrified by fast quenching even monoatomic substances. Second melting temperatures accompanied by weak exothermic or endothermic heat are often observed at Tn+ after remelting them above the equilibrium thermodynamic mel…
View article: Prediction of Second Melting Temperatures Already Observed in Pure Elements by Molecular Dynamics Simulations
Prediction of Second Melting Temperatures Already Observed in Pure Elements by Molecular Dynamics Simulations Open
A second melting temperature occurs at a temperature Tn+ higher than Tm in glass-forming melts after heating them from their glassy state. The melting entropy is reduced or increased depending on the thermal history and on the presence of …
View article: On Structural Rearrangements Near the Glass Transition Temperature in Amorphous Silica
On Structural Rearrangements Near the Glass Transition Temperature in Amorphous Silica Open
The formation of clusters was analyzed in a topologically disordered network of bonds of amorphous silica (SiO2) based on the Angell model of broken bonds termed configurons. It was shown that a fractal-dimensional configuron phase was for…
View article: Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States
Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States Open
The thermal history of melts leads to three liquid states above the melting temperatures Tm containing clusters—bound colloids with two opposite values of enthalpy +Δεlg × ΔHm and −Δεlg × ΔHm and zero. All colloid bonds disconnect at Tn+ >…
View article: Homogeneous nucleation of phase transformations in supercooled water
Homogeneous nucleation of phase transformations in supercooled water Open
The classical nucleation equation, applied to two liquids, is completed by an\nadditional enthalpy for solid supercluster formation governing the liquid and\nglass transformations. This model, successfully applied to d-mannitol,\ntriphenyl…
View article: Influence of Non - Condensable Gases on the Processes of Heat and Mass Transfer during Film Condensation of Steam in Heat Exchangers
Influence of Non - Condensable Gases on the Processes of Heat and Mass Transfer during Film Condensation of Steam in Heat Exchangers Open
The aim of the article is a quantitative assessment of the influence of non-condensable gases on the intensity of heat and mass transfer processes during film condensation of steam in the specific conditions for heat exchanger. The task is…
View article: Predicting Glass-to-Glass and Liquid-to-Liquid Phase Transitions in Water
Predicting Glass-to-Glass and Liquid-to-Liquid Phase Transitions in Water Open
Glass-to-glass and liquid-to-liquid phase transitions were observed many years ago in bulk and confined water with or without applied pressure. It is shown that they result from the competition of two-liquid phases separated by an enthalpy…
View article: Experimental investigation on a pulsating heat pipe with hydrogen
Experimental investigation on a pulsating heat pipe with hydrogen Open
The pulsating heat pipe (PHP) has been increasingly studied in cryogenic application, for its high transfer coefficient and quick response. Compared with Nb3Sn and NbTi, MgB2 whose critical transformation temperature is 39 K, is expected t…