Document Type |
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Article In Journal |
Document Title |
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Thermal kinetics and short range order parameters of Se80X20 (X = Te, Sb) binary glasses Thermal kinetics and short range order parameters of Se80X20 (X = Te, Sb) binary glasses |
Subject |
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physics |
Document Language |
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English |
Abstract |
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Bulk Se80Te20 and Se80Sb20 glasses were prepared using the melt-quench technique. Differential
scanning calorimetry (DSC) curves measured at different heating rates (5 K/mina parts per thousand
currency sign alpha a parts per thousand currency sign50 K/min) and X-ray diffraction (XRD) are used
to characterize the as-quenched specimens. Based on the obtained results, the activation energy of
glass transition and the activation energy of crystallization (E (g), E (c)) of the Se80Te20 glass are
(137.5, 105.1 kJ/mol) higher than the corresponding values of the Se80Sb20 glass (106.8, 71.2
kJ/mol). An integer n value (n=2) of the Se80Te20 glass indicates that only one crystallization
mechanism is occurring while a non-integer exponent (n=1.79) in the Se80Sb20 glass means that two
mechanisms are working simultaneously during the amorphous-crystalline transformations. The total
structure factor, S(K), indicates the presence of the short-range order (SRO) and the absence of the
medium-range order (MRO) inside the as-quenched alloys. In an opposite way to the activation
energies, the values of the first peak position and the total coordination number (r (1), eta (1)), obtained
from a Gaussian fit of the radial distribution function, of the Se80Te20 glass are (2.42 nm, 1.99 atom)
lower than the corresponding values (2.55 nm, 2.36 atom) of the Se80Sb20 specimens |
ISSN |
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0947-8396 |
Journal Name |
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING |
Volume |
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115 |
Issue Number |
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3 |
Publishing Year |
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1435 AH
2014 AD |
Article Type |
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Article |
Added Date |
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Tuesday, August 1, 2017 |
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Researchers
A.H Moharram | Moharram, A.H | Investigator | Doctorate | mohar200@yahoo.com |
M Abu El-Oyoun | Abu El-Oyoun, m | Researcher | Doctorate | |
A.M Abdel-Baset | Abdel-Baset, A.M | Researcher | | |
|