Soft magnetic ternary and quarternary Y-M-B bulk metallic glasses (M= Fe, Co, Ni)

In this work, the glass forming ability and magnetic properties of Fe_72-xCo_xY₄B₂₀ (x = 10, 20, 30, 38, 46) and Fe_72-yNi_yY₆B₂₂ (y= 5, 10, 15, 20) bulk metallic glasses are investigated. XRD diffractometer is used for structural characterization of the samples and their thermal properties are measured by differential calorimetry. Addition of Co enhances the glass forming ability of the Fe-Y-B alloy while the Ni addition deteriorates. The replacement of Fe by Co or Ni leads to a decrease of crystallization temperature from 575°C (Fe₇₆Y₄B₂₀) to 574°C (46 at%Co) and from 657°C (Fe₇₂Y₆B₂₂) to 562°C(20 at% Ni), respectively. The saturation magnetization decreases from 1.6 T to 1.47 and from 1.5 T to 0.95 T as the Co or Ni replacement increases to 46 at% and 20 at%, respectively.