【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3.5mm;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1.10～1.25T、3～6A/m、184～206GPa、1.6%～2.0%和3227～3484MPa。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。更多还原

【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.更多还原