Phase separation and glass forming ability of (Fe0.72Mo0.04B0.24)100-xGdx (x = 4, 8) bulk metallic glasses

Abstract The effect of Gd addition on the Glass Forming Ability (GFA), magnetic and thermal properties in (Fe 0.72 Mo 0.04 B 0.24 ) 100-x Gd x (x = 4, 8) bulk metallic glasses were investigated. The examined amorphous alloys' structural, thermal and magnetic properties were investigated by using X-ray diffraction (XRD), scanning electron mi-croscopy (SEM) differential scanning calorimeter (DSC) and vibrating sample magnetometer (VSM). The results show that molten (Fe 0.72 Mo 0.04 B 0.24 ) 92 Gd 8 presents the fully amorphous structure and solidifies into two different Fe-rich and B-rich amorphous phases. The DSC curve shows that the (Fe 0.72 Mo 0.04 B 0.24 ) 92 Gd 8 has supercooled liquid region (∆ T x ) of about 70 K and the saturation magnetization ( J s ) and coercivity ( H c ) for as-cast bulk metallic glasses (BMGs) was 0.53 T and 223 A/m respectively.