The Effects of B Addition on the Structure and Magnetic Properties of AlCrFeNiMnSi High Entropy Alloy

In the present study, the effect of boron on the structural and magnetic properties of AlCrFeNiMnSiBx high entropy alloys (HEAs) were investigated. In this regard, different percentage of boron element was added to the base composition and the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) methods. Based upon the results obtained, the tendency of Si element for the formation of silicide phases prevents the stabilization of single FCC and BCC solid solution phases in AlCrFeNiMnSi alloy. The boron element has significant effect on destabilization of silicide phases and by increasing in the percentage of this element, the simple BCC solid solution phase was observed to be the dominate phase. Of course, the presence of boron had an adverse effect on the magnetic properties of prepared alloys. The magnetization saturation of AlCrFeNiMnSiBx decreased from 29.8 to about 6 emu/g with the increase in the boron content.