The bulk metallic glassy(BMG) rods of [(Fe0.5Co0.5)0.72B0.192Si0.048Nb0.04]100-xYx(x=0-6) and [(FexCo1-x)0.72B0.192Si0.048Nb0.04]96Y4(x=0.5-0.8) were prepared by copper mold casting.The structure,thermal stability,and magnetic properties of the samples were studied by X-ray diffraction(XRD),differential scanning calorimetry(DSC),and vibrating sample magnetometer(VSM).Adding 1at% to 6at% of yttrium,the bulk glassy alloy rods of [(Fe0.5Co0.5)0.72B0.192Si0.048Nb0.04]100-xYx(x=0-6) with the diameter of 3 mm were not formed,and the sample with 4at% of yttrium showed less crystalline phase than others.When the Fe/Co atomic ratio was between 5:5 and 7:3,the bulk glassy alloy rods of [(Fe1-xCox)0.72B0.192Si0.048Nb0.04]96Y4(x=0.5-0.8) with the diameter of 2 mm were fabricated.In the(Fe,Co)-B-Si-Nb-Y BMGs,when the Fe content increased,the thermal stability,the supercooled liquid region,and the glass-forming ability(GFA) decreased,but the saturation magnetization(Ms) increased.
Dun-gu Wen Yuan-zheng Yang Zhen-jiang Dong Ping-jun Tao Zhi-wei Xie Xian-chao Chen
