【摘要】 用铜模吸铸工艺制备了[(Fe0.5Co0.5)0.72B0.192Si0.048Nb0.04]100-xTbx和[(FeyCo1-y)0.72B0.192Si0.048Nb0.04]98Tb2块体非晶合金,并用XRD、DSC、振动样品磁强计(VSM)测试和分析了微量稀土元素Tb和不同Fe与Co比例对(Fe,Co)-B-Si-Nb体系玻璃形成能力、热稳定性及软磁性能的影响。试验表明,添加2 at%的Tb,提高了合金的非晶热稳定性和形成能力,制得的非晶合金棒的直径从2 mm增加到3 mm,但饱和磁化强度下降;[(FeyCo1-y)0.72B0.192Si0.048Nb0.04]98Tb2合金随Fe与Co比例从5∶5增加至7∶3时,合金的非晶形成能力呈下降趋势,但均能形成直径为2 mm的非晶棒,而其热稳定性和饱和磁化强度随铁含量的增大而提高。更多还原

【Abstract】 The bulk metallic glass rods[(Fe0.5Co0.5)0.72B0.192Si0.048Nb0.04]100-xTbx(x=1,2,3) and [(FeyCo1-y)0.72B0.192Si0.048Nb0.04]98Tb2(y=0.5,0.6,0.7,0.8)with diameters 2 to 3mm were prepared by copper mold casting.The structure,thermal stabilities and magnetic properties of the samples were studied by X-ray diffractometer(XRD),differential scanning calorimeter(DSC)and vibrating sample magnetometer(VSM).The results show that 2at% addition of Terbium to the[(Fe0.5Co0.5)0.72B0.192Si0.048Nb0.04]100-xTbxcan increase the glass forming ability(GFA)and thermal stability.The maximum diameter of the glassy alloy rods increases from 2mm to 3mm,but saturation magnetization of the alloy decreases.With increasing iron content,the glass forming ability of [(FeyCo1-y)0.72B0.192Si0.048Nb0.04]98Tb2 alloy decreases,but thermal stability and saturation magnetization increases.更多还原