Fe75-xMxHf3Y2B20(M=Co, Nb; x=0, 4)块体非晶合金的制备及其热、软磁性能

Preparation, Thermal and Soft Magnetic Properties of Fe75-xMxHf3Y2B20(M=Co, Nb; x=0, 4) Bulk Amorphous Alloys

摘要:

采用单辊法和铜模铸造法制备了Fe75-xMxHf3Y2B20(M=Co, Nb; x=0, 4 at%)合金系的非晶薄带和非晶棒样品，并测试了该非晶合金系的差示扫描量热曲线、X射线衍射图谱和软磁性能。结果表明：少量的Nb或Co替代Fe75Hf3Y2B20中的Fe元素，合金的热稳定性和玻璃形成能力可得到明显的提高；其中Fe71Nb4Hf3Y2B20的过冷液相区宽度ΔTx高达75 K，约化玻璃转变温度Trg为0.58，直径达4 mm，饱和磁感应强度为0.97~1.08 T，该非晶合金同时具有较大的热稳定性、较

Abstract:

Amorphous ribbon and rods of Fe75-xMxHf3Y2B20(M=Co, Nb; x=0, 4) alloys were prepared by the melt-spun and copper mold casting method, respectively. The thermal stability, crystallization, melting behavior and soft magnetic properties were investigated by differential scanning calorimetry (DSC), differential thermal analysis (DTA), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The results indicate that the thermal stability and glass-forming ability of Fe75Hf3Y2B20 can be obviously increased via the replacement of Fe by 4 at% Nb or Co element, and the amorphous alloys of Fe71Nb4Hf3Y2B20 exhibits wide supercooled liquid region of 75 K, high glass forming ability of 4 mm and high saturation magnetization of 0.97~1.08 T. The amorphous alloy has the high thermal stability, the better glass-forming ability and soft magnetic properties