(上海大学 微结构重点实验室，上海 200072)
摘 要: 采用铜模吸铸法制备[Fe0.71(DyxNd1-x)0.05B0.24]96Nb4(x=0-1，摩尔分数)块体合金，利用X射线衍射(XRD)、差示扫描量热仪(DSC)和振动样品磁强计(VSM)研究合金的非晶形成能力(GFA)和磁性能。结果表明：该体系合金均具有较好的非晶形成能力，可制备出直径为2 mm的完全非晶合金，随着Dy含量(x)的增加，合金的非晶形成能力逐渐增强。当x=1时，可制得直径为3 mm的完全非晶合金；饱和磁化强度(Ms)由x=0时的Ms=97.59 A？m2/kg逐渐降低到x=1时的Ms=75.85 A？m2/kg。该体系直径为2 mm的块体非晶合金均表现为明显的软磁性特征。
关键字: 铁基大块非晶合金；非晶形成能力；磁性能；磁化强度
（Laboratory for Microstructure, Shanghai University, Shanghai 200072, China）
Abstract:[Fe0.71(DyxNd1-x)0.05B0.24]96Nb4(x=0-1, mole fraction) bulk alloys were prepared by copper mold suction casting method. The glass-forming ability (GFA) and magnetic property were investigated by X-ray diffractometry (XRD), differential scanning calorimetry (DSC) and vibrating sample magnetometry (VSM). The results indicate that the alloys exhibit good glass-forming ability, and amorphous alloys with diameter of about 2 mm can be obtained. The GFA is improved gradually with the increase of Dy content (x), which is confirmed by the amorphous alloy with diameter of 3 mm when x=1. The amorphous alloys of 2 mm in diameter show the obvious soft magnetic behavior. The saturation magnetization (Ms) decreases gradually from 97.59 A？m2/kg when x=0 to 75.85 A？m2/kg when x=1.
Key words: Fe-based bulk amorphous alloy; glass-forming ability; magnetic property; magnetization
