Cu-Zr is among the family of the binary metallic glasses which are well-known for their superior mechanical and magnetic properties. From the structure point of view, the amorphous metallic glasses are in non-equilibrium solid state. Therefore, it becomes important to study the factors, which may have crucial bearings on its end applications, related to the amorphous metallic structures. Stability is an important factor related to crystallization, which is generally a thermally activated process of transition from a disordered amorphous structure to an ordered crystal structure. Study of kinetics of crystallization provides E,, the activation energy of crystallization and parameters like Avrami exponent n, responsible for the mechanism of crystallization. This helps to determine the thermal stability of the metallic glasses. CusoZrso metallic glass had been prepared by single roller melt-spinning technique. The DSC thermogram recorded at four different heating rates exhibits a two stage crystallization of this glassy system. Kinetics of crystallization of this glass has been studied in terms of activation energy using the Matusita and Sakka equation. It is found that the crystallization process is diffusion-controlled.
The dimensionality of the fractal crystal growth is interpreted in terms Avrami exponent n, which has been found to be 2.6, 2.4 and 2.2 for the temperatures 539 K, 545 K and 549 K respectively. Besides, the activation energy of crystallization has also been independently derived through modified Kissinger equation.