Structural, magnetic and electron transfer effect of Cr additive on Fe65Co35 nanopowder fabricated mechanical alloying

•Mechanical alloying was used for the synthesis of (Fe65–Co35)95Cr5.•The effect of Cr additive investigates on Fe–Co properties.•Structural, magnetic and electrical transfer of (Fe65–Co35)95Cr5 was used in this study.

In this paper, structural, electrical and magnetic properties of nanocrystalline (Fe70Co30)100 − xCrx (x = 0, 5) powders produced by mechanical alloying (MA) have been investigated. Some parameter such as milling times (up to 100 h) and compositional ration (0% and 5% Cr) was investigated in this study. Characterizations of the prepared powders were carried out by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), elemental map analysis, energy-dispersive X-ray spectroscopy (EDS) and vibratory sample magnetometer (VSM) methods. The results show the formation of the Fe(Co) and Fe(Co, Cr) solid solutions completed in 32 and 100 h of milling time, respectively. X-ray diffraction experiment results indicate that Fe65Co35 and (Fe65Co35)95Cr5 average grain size reduces from 180 nm before milling process (0 h) to about 18 and 10 nm with increasing of milling time, respectively. Magnetic properties of prepared nanoalloys were investigated using vibratory sample magnetometer method and the results show interesting changes in milling process. The effect of chromium additive also was performed using electrochemical impedance spectroscopy method. This study shows the presence of chromium increasing charge transfer resistant in electrochemical process.

Graphical abstractIn this research, structural, electrical and magnetic properties of nanocrystalline (Fe65–Co35)95Cr5 powders produced by mechanical alloying have been investigated.Figure optionsDownload full-size imageDownload as PowerPoint slide