Static and Dynamic Thermal Properties of a Pd40Ni40Si20 Glassy Alloy
| Autor: | Akihisa Inoue, Tony Spassov, Ludmil Drenchev, Georgi Stefanov, Stoyko Gyurov |
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| Rok vydání: | 2019 |
| Předmět: |
lcsh:TN1-997
Materials science crystallization differential scanning calorimetry (DSC) Thermodynamics 02 engineering and technology Activation energy Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences law.invention Condensed Matter::Materials Science Viscosity law metallic glass 0103 physical sciences General Materials Science Crystallization Supercooling lcsh:Mining engineering. Metallurgy 010302 applied physics Amorphous metal Metals and Alloys Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter::Soft Condensed Matter melt spinning viscosity Melt spinning 0210 nano-technology Glass transition |
| Zdroj: | Metals Volume 9 Issue 11 Metals, Vol 9, Iss 11, p 1157 (2019) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met9111157 |
| Popis: | The thermal properties of a Pd40Ni40Si20 glassy alloy with the largest supercooled liquid region among the glassy alloys containing Si as a metalloid element are studied using static and dynamic measurement methods. The relatively wide supercooled liquid region of 45 K, defined by the temperature interval between the glass transition temperature (Tg) and the onset temperature of crystallization (Tx), and the viscosity of the supercooled liquid, varying from 2.7 × 1010 to 3.2 × 1011 Pa· s, make this glass suitable for the introduction of controlled pores by a viscous flow in the temperature range Tg~Tx. The obtained activation energy for crystallization, 272 ± 19 kJ/mol, is slightly higher than that of Tg (228 ± 11 kJ/mol), indicating the dominant contribution of the atomic transport barrier in the overall energy barrier for crystallization. |
| Databáze: | OpenAIRE |
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