Abstract
In the present work, the effect of small additions of Nb and Y to Fe78B14Si8 alloy is analyzed concerning its glass forming ability and magnetic properties. Small ingots were obtained by injection casting method into a cylindrical Cu-mold. Different casting machines were used in order to evaluate the role of processing parameters on glass formation. Hysteresis loops have been measured using a vibrating sample magnetometer (VSM) and inductive methods. Structural properties were measured using differential scanning calorimetry and X-ray diffraction (XRD). The glassy phase is obtained only with a small addition of both Nb and Y (4 and 3 at. %, respectively). Moreover, a complete glassy phase with good soft magnetic properties is obtained only with the use of water cooled Cu-mold. In such case, the saturation magnetization is 0.91 T with a coercive field of 170 A/m.
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