(1. 湘潭大學(xué) 能源工程學(xué)院，湘潭 411100；
2. 湘潭大學(xué) 土木工程與力學(xué)學(xué)院，湘潭 411105；
3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan)
摘 要: 采用微合金化技術(shù)，用銅模鑄造法制備Fe-Hf-Nb-B-Y塊體非晶合金。采用X射線衍射儀、差示量熱掃描儀、掃描電鏡、振動樣品磁場儀和Instron萬能材料試驗(yàn)機(jī)研究Fe-Hf-Nb-B-Y合金系的玻璃形成能力、軟磁性能和力學(xué)性能。結(jié)果表明：Y部分替代Fe能明顯改善Fe73−xNb4- Hf3YxB20合金系的玻璃形成能力；x=0, 1, 2和3時(shí)對應(yīng)合金的最大玻璃形成直徑分別為2，3，4和3.5 mm；Fe-Hf-Nb-B-Y塊體非晶合金的飽和磁感應(yīng)強(qiáng)度、矯頑力、彈性模量、彈性應(yīng)變和壓縮斷裂強(qiáng)度分別為1.10~1.25 T、3~6 A/m、184~206 GPa、1.6%~2.0%和3 227~3 484 MPa。結(jié)合實(shí)驗(yàn)數(shù)據(jù)，初步討論微合金化對Fe-Hf-Nb-B-Y合金系的玻璃形成能力、軟磁性能和力學(xué)性能的影響。
關(guān)鍵詞：Fe-Nb-Hf-Y-B合金；塊體非晶合金；微合金化技術(shù)；玻璃形成能力；軟磁性能；力學(xué)性能
關(guān)鍵字: Fe-Nb-Hf-Y-B合金；塊體非晶合金；微合金化技術(shù)；玻璃形成能力；軟磁性能；力學(xué)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
