2010 Volume 51 Issue 2 Pages 256-260
The thermal crystallization behavior of bulk Se90−xTe10Cdx (x=0, 3, 9, and 15 at%) glasses was studied by differential thermal analysis, (DTA), under non-isothermal conditions. The glass transition temperature, (Tg), the onset crystallization temperature, (Tc), and the peak temperature of crystallization, (Tp), were found to be dependent on both the composition and the heating rates. From the dependence on the heating rates (α) of (Tg) and (Tp), the activation energy for the glass transition, (Et), and the activation energy for crystallization, (Ec), were calculated and their composition dependence is discussed. The crystalline phases resulting from DTA and scanning electron microscopy (SEM) have been identified using X-ray diffraction. The results indicate one dimensional growth from the surface to the inside for all the studied compositions. The kinetic parameters determined have made it possible to discuss the glass forming ability.
