(1. 湘潭大学 能源工程学院，湘潭 411100；
2. 湘潭大学 土木工程与力学学院，湘潭 411105；
3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan)
摘 要: 采用微合金化技术，用铜模铸造法制备Fe-Hf-Nb-B-Y块体非晶合金。采用X射线衍射仪、差示量热扫描仪、扫描电镜、振动样品磁场仪和Instron万能材料试验机研究Fe-Hf-Nb-B-Y合金系的玻璃形成能力、软磁性能和力学性能。结果表明：Y部分替代Fe能明显改善Fe73−xNb4- Hf3YxB20合金系的玻璃形成能力；x=0, 1, 2和3时对应合金的最大玻璃形成直径分别为2，3，4和3.5 mm；Fe-Hf-Nb-B-Y块体非晶合金的饱和磁感应强度、矫顽力、弹性模量、弹性应变和压缩断裂强度分别为1.10~1.25 T、3~6 A/m、184~206 GPa、1.6%~2.0%和3 227~3 484 MPa。结合实验数据，初步讨论微合金化对Fe-Hf-Nb-B-Y合金系的玻璃形成能力、软磁性能和力学性能的影响。
关键词：Fe-Nb-Hf-Y-B合金；块体非晶合金；微合金化技术；玻璃形成能力；软磁性能；力学性能
关键字: Fe-Nb-Hf-Y-B合金；块体非晶合金；微合金化技术；玻璃形成能力；软磁性能；力学性能
bulk amorphous alloys
（1. College of Energy Engineering, Xiangtan University, Xiangtan 411100, China;
2. Civil Engineering and Mechanics College, Xiangtan University, Xiangtan 411105, China;
3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan）
Abstract: By micro-alloying technology, Fe-Hf-Nb-B-Y bulk amorphous alloys were prepared by copper mold casting method. The glass-forming ability (GFA), soft-magnetic and mechanical properties of these bulk amorphous alloys were characterized by X-ray diffractometry (XRD), differential scanning calorimeter (DSC), scanning electronic microscopy (SEM), vibrating sample magnetometry (VSM) and Instron type tester. The results show that a partial substitution of Fe by Y causes a significant improvement of the GFA of Fe-Hf-Nb-B-Y alloys. The maximal diameters for glass formation are 2 mm for Y-free alloy, 3 mm for 1%(molar fraction) Y alloy, 4 mm for 2% Y alloy and 3.5 mm for 3% Y alloy. The saturation magnetization, coercive force, elastic modulus, elastic strain and compressive fracture strength of Fe-Hf-Nb-B-Y bulk amorphous alloys are in the range of 1.10−1.25 T, 3−6 A/m, 184−206 GPa, 1.6%−2.0% and 3 227−3 484 MPa, respectively. Based on the experimental results, the effects of micro-alloying on GFA, soft-magnetic and mechanical properties of the alloy series were discussed.
Key words: Fe-Nb-Hf-Y-B alloy; bulk amorphous alloy; micro-alloying technology; glass-forming ability; soft-magnetic properties; mechanical properties
