|
|
 |
| |
|
|
|
Crystallization rate and Avrami index of different composition of Se80−xTe20Sbx |
|
|
|
PP: 9-16 |
|
|
|
Author(s) |
|
|
|
E. R. Shaaban,
H. A. Elshaikh,
M. M. Soraya,
|
|
|
|
Abstract |
|
|
| Crystallization kinetics of Se80−xTe20Sbx (x= 0, 2, 4, 6, 8, 10) glassy compositions have been investigated using differential
scanning calorimetry under non-isothermal conditions. The kinetic parameters as activation energy of glass transition and activation
energy of crystallization have been determined. It was found a gradual increase of these parameters with increasing the Sb content
within the composition, this trend was attributed to the larger atomic weight of Sb in comparison with that of Se. The nucleation and
growth morphology have been determined through the theoretical work that introduced by Johnson, Mehl and Avrami (JMA model).
According to the average values of Avrami indices, < n >, Se20Te80 has volume nucleation, one dimensional growth and the other
remaining compositions have volume nucleation, two dimensional growth. These results of Avrami indices were emphasized through
an investigation of crystalline phases a cross thermal treatment using X-rays diffraction. |
|
|
|
|
|
|
|
