【摘要】 采用水冷铜模吸铸工艺制备了一系列的(Fe0.5Co1-xNix)72B19.2Si4.8Nb4(x=0,0.05,0.1,0.15,0.2,0.25,0.3,0.4)块体非晶合金,并采用X射线衍射仪(XRD)、差热分析仪(DTA)、振动样品磁强计(VSM)测试了块体非晶合金的结构、热稳定性和软磁性能。探讨了不同Ni/Co比例及添加稀土元素Dy对FeCoNiBSiNb系合金玻璃形成能力(GFA)、热稳定性及磁性能的影响。结果表明:当x=0.05,0.1,0.15,0.2时可制备出直径2mm的非晶合金棒,但不能获得3mm非晶合金棒,x=0.25,0.3,0.4均不能获得直径2mm的非晶合金棒,且随Ni/Co比例的增大,即随Ni含量的增加,热稳定性先增加,后逐渐减小,过冷液相区ΔTx逐渐减小,非晶合金的玻璃形成能力呈下降趋势,非晶合金的饱和磁化强度(Ms)下降。添加1at%Dy后,提高了合金的非晶形成能力,可制备出直径3mm的[(Fe0.5Co0.4Ni0.1)72B19.2Si4.8Nb4]99Dy1非晶合金棒,但合金的Ms下降。更多还原

【Abstract】 The bulk amorphous alloys (Fe0.5Co1-xNix)72B19.2Si4.8Nb4 (x=0,0.05,0.1,0.15,0.2,0.25,0.3,0.4) were prepared by means of copper-mold vacuum suction casting.The structure,thermal stability and magnetic properties were detected by X-ray diffraction (XRD),differential scanning carometery (DSC) and vibrating sample magnetometer (VSM).The effects of different Ni/Co ratio and Dy addition on the glass forming ability(GFA) and magnetic property of FeCoNiBSiNb bulk amorphous alloy were investigated.The results show that when x =0,0.05,0.1,0.15,0.2,full amorphous alloy rods (Fe0.5Co1-xNix)72B19.2Si48Nb4 with 2 mm in diameter can be obtained.But when x is more than 0.2,with the increase of Ni content,the GFA of the alloys decreases,and the saturation magnetization (Ms) decreases,too.After addition of 1at%Dy,the GFA of (Fe0.5Co0.4Ni0.1)0.72B0.192Si0.48Nb0.0499Dy1 increases.The full amorphous phase rods with the maximum diameter of 3 mm can be obtained,but the Ms decreases.更多还原