Fe_(73-χ)Nb_4Hf_3Y_χB_(20)块体非晶合金的制备及其性能  

Preparation and properties of Fe_(73-χ)Nb_4Hf_3Y_χB_(20)bulk amorphous alloys

作　　者：张志纯[1] 龙志林[2] 李峰[2] 彭建[2] 危洪清[2] 唐平[1] 邵勇 

机构地区：[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

出　　处：《中国有色金属学报》2009年第3期523-528,共6页The Chinese Journal of Nonferrous Metals

基　　金：湖南省科技厅计划资助项目(2008FJ3095);湖南省教育厅科学研究资助项目(08C880)

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。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.

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 

分 类 号：TG139.8[一般工业技术—材料科学与工程]