Saturation magnetization studies on iron-nickel ball milling nanopowders and spark plasma sintered specimens

Saturation Magnetization (Ms) is one of the important states among all magnetic properties, it decides that the materials can be either used as a hard or soft magnet. Mechanical alloyed and spark plasma sintered at the promising levels of 40, 50 and 75 wt% Ni-Fe have been investigated to find out the Ms with the effect of the composition, grain size, particle size and extent of alloying. This study revealed that the value of Ms is increased due to the formation of a Ni3Fe compound, and it depends on the grain size. The introduction of the Ni3Fe compound was confirmed by X-ray diffraction analysis. It was found that ambient temperature played a critical role in sintering Ni-Fe alloy. The value of the Ms is found to be high at the intermediate particle size and become lower when the particle size is either larger or smaller. From this study, it was cleared that preparation of Ni-Fe alloy under the right temperature with the proper grain size favours for the potential downstream applications and generation of light materials.