摘要
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 1 at% 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.
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 1 at% 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.
基金
supported by the National Natural Science Foundation of China (Nos50771037,50971046)
the Doctoral Program Foundation of the Ministry of Education of China (No200805620004)
the Natural Science Foundation of Guangdong Province,China (No06021473)
