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/sub 72-x/Co/sub x/Y/sub 4/B/sub 20/ (x = 10, 20, 30, 38, 46) and Fe/sub 72-y/Ni/sub y/Y/sub 6/B/sub 22/ (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/spl deg/C (Fe/sub 76/Y/sub 4/B/sub 20/) to 574/spl deg/C (46 at%Co) and from 657/spl deg/C (Fe/sub 72/Y/sub 6/B/sub 22/) to 562/spl deg/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.