|
Document Type |
: |
Article In Journal |
|
Document Title |
: |
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 |
: |
physics |
|
Document Language |
: |
English |
|
Abstract |
: |
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 |
: |
0947-8396 |
|
Journal Name |
: |
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING |
|
Volume |
: |
115 |
|
Issue Number |
: |
3 |
|
Publishing Year |
: |
1435 AH
2014 AD |
|
Article Type |
: |
Article |
|
Added Date |
: |
Tuesday, August 1, 2017 |
|
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 | | |
|