Abstract
A study of the crystallization kinetics of glassy alloy Cu 0.10As 0.45Te 0.45 was made using a method in which the crystallization rate is deduced bearing in mind the dependence of the reaction rate constant on time, through temperature. The method was applied to the experimental data obtained by differential scanning calorimetry, using continuous-heating techniques. The alloy studied exhibited overlapping exothermic peaks which were resolved using a numerical method developed by the authors, making it possible to study the crystallization phases separately. The kinetic parameters determined have made it possible to discuss the different types of nucleation and crystal growth exhibited by each stage of crystallization process. The phases at which the alloy crystallizes after the thermal process have been indentified by X-ray diffraction. In first stage of process, microcrystallites of AsTe are crystallized in an amorphous matrix. In the second transformation, As 22Te 3 is crystallized. Finally, in the third stage the crystalline phase CuTe appear, coexisting with the aforementioned crystalline compounds.
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