Abstract
The glass forming ability and soft magnetic properties of Fe-Mn-Si-B-Cu were investigated in this study. Multi-component alloy ribbons with compositions of Fe75Mn3Si10B12-XCuX(x = 0, 1, 2, 3, 4 at.%) were synthesized by the single roller melt-spinning method. To examine the thermal properties, the as-cast ribbons was measured with differential scanning calorimetry(DSC). Microstructure were examined by X-ray diffractometer(XRD) and scanning electron microscopy(SEM). Alloying additions of Cu=0, 1, 2 at.% were confirmed amorphous by XRD and SEM images. When the additions came up to Cu=3, 4 at.%, α-Fe、Fe3Si、Mn2B0.98 phase were identified. Amorphous ribbons’ thermal properties were measured, supercooled liquid regions were 166.23 K and 54.73 K when additions of Cu=0, 1, at.% respectively. The saturation magnetization Ms was increased from 1.45 T to 1.57 T and coercivity Hc was decreased from 21.41 A/m to 5.41 A/m when annealing Fe75Mn3Si10B11Cu1 for 60s at 573 K and 673 K. It was verified that Cu alloying additions increased the nucleation rate can improve the soft magnetic properties of alloy ribbon.
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