The activation energy and kinetic of the nanocrystallization process of Al_(85) Ni_9 Nd_4Co_2 amorphous alloy

摘要

The interest presented by the nanostructured aluminium alloys is due first to of all the impressive resistance characteristics achieved by these alloys in comparison with the conventional aluminium alloys. From the category of these nanostructured aluminium alloys, spectacular results regarding the increase of the resistance characteristics were obtained with the nanocrystalline alloys from Al-TM-RE systems. Significant results regarding the processing of nanocrystalline aluminum based alloys were obtained by the controlled devitrification process of the amorphous alloy, which is realized by an annealing heat treatment at temperatures of about the temperature of primary crystallization of the amorphous phase. Consequently, the present paper establishes the kinetic of the crystallization process and the crystallization energy of Al_(85)Ni_9Nd_4Co_2 alloy for the optimization of the nanocrystallization process in order to obtain the desired mechanical resistance characteristics.