Mechanical Synthesis of Iron and Nickel Solid Solution by High Energy Ball Milling for Packaging

Mechanical alloying (MA) is a solid-state powder processing technique involving repeated cold welding and fracturing of powder particles in a high-energy ball mill. It has been used to obtain nanocrystalline binary system FeNi. Fe and Ni elemental powders have been ball milled in a planetary mill (Pulverisette5, Fritsch) for various times up to several hours. The morphology of the powders was examined using scanning electron microscopy (SEM). X-ray diffraction (XRD) has been employed to follow the structural evolution during the ball milling process. X-ray pattern of argon-milled powders show NiFe Solid solution after 30 h milling accompanying. Furthermore, SEM micrographs show that increasing milling time to 70 hrs results in cold welding phenomena to be main phenomena. It also became clear that at the time of 50 hours, between fracturing and cold welding the balance phenomenon was created.