Connecting Glass-Forming Fragility to Network Topology
نویسندگان
چکیده
منابع مشابه
Fragility and thermodynamics in nonpolymeric glass-forming liquids.
For nonpolymeric supercooled liquids, the empirical correlation m = 56Tg DeltaCp(Tg)/DeltaHm provides a reliable means of correlating dynamic and thermodynamic variables. The dynamics are characterized by the fragility or steepness index m and the glass transition temperature Tg, while thermodynamics enter in terms of the heat capacity step DeltaCp at Tg and the melting enthalpy DeltaHm. The co...
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In contrast to pure metals and most non-glass forming alloys, metallic glass-formers are moderately strong liquids in terms of fragility. The notion of fragility of an undercooling liquid reflects the sensitivity of the viscosity of the liquid to temperature changes and describes the degree of departure of the liquid kinetics from the Arrhenius equation. In general, the fragility of metallic gl...
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Differential scanning calorimetry measurements have been performed on elemental Se as well as on GexSe94 xIn6 (x 1⁄4 4, 8, and 11 at%) and on GeySe88 yIn12 (y 1⁄4 5, 7, and 9 at%) chalcogenide glasses. From the cooling rate dependence of the fictive temperature, the apparent activation energies, Dh*, and the fragility indices, m, as defined in the strong–fragile glass-forming liquid concept, ar...
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Elastic moduli of the glass and fragility of the corresponding supercooled liquid were found to be correlated in recently published results. In the present work, compositions within the Ca-Mg-Cu system are used to study the relationships between liquid fragility, glass-forming ability and elastic properties. The correlation between liquid fragility and elastic properties already observed for gl...
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ژورنال
عنوان ژورنال: Frontiers in Materials
سال: 2019
ISSN: 2296-8016
DOI: 10.3389/fmats.2019.00144