(1. 湖南大学 材料学院，长沙 410083;
2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan)
摘 要: 利用普通的铜模铸造制备了一系列富Fe的Fe-Nd-Al块状非晶合金，采用X射线衍射仪、差示量热扫描仪、振动样品磁场仪和Instron万能材料试验机研究了Fe-Nd-Al块状非晶合金的热稳定性、室温磁性和力学性能。结果表明：Fe50Nd35Al15、Fe45Nd40Al15和Fe42.5Nd42.5Al15块状非晶合金的ΔTm (ΔTm=Tm−Tx)和晶化开始温度(Tx)与熔点(Tm)的比值分别为106、90和64 K及0.88、0.90和0.93；其临界尺寸分别为1.5、3和4 mm。此外，随Fe含量的减少，大块非晶的非晶形成能力和硬磁性能提高，但其力学性能有所下降。
关键字: Fe-Nd-Al合金；大块非晶合金；非晶形成能力；热稳定性；硬磁性能；力学性能
bulk Fe-Nd-Al amorphous alloys
（1. School of Materials Science, Hunan University,Changsha 410082, China;
2. Institute for Materials Research, Tohoku University,Sendai 980-8577, Japan）
Abstract:Fe-rich Fe-Nd-Al bulk amorphous alloys with hard magnetic properties were produced by copper mold casting method. The amorphous forming ability, thermal stability, magnetic properties and mechanical properties of these alloys were investigated by XRD, DSC, VSM and Instron type tester. The results show that ΔTm (ΔTm=Tm−Tx) and reduced crystallization temperature (Tx/Tm) of Fe50Nd35Al15, Fe45Nd40Al15 and Fe42.5Nd42.5Al15 bulk amorphous alloys are 106 K, 90 K, 64 K and 0.88, 0.90, 0.93, respectively. And the maximum diameters of these alloys are 1.5, 3 and 4 mm, respectively. Moreover, with decreasing Fe atom content, the amorphous-forming ability and hard magnetic properties of Fe-Nd-Al alloys are improved, but the mechanical properties are decreased. These Fe-Nd-Al bulk amorphous alloys with hard magnetic properties and high amorphous-forming ability are promising for future progress as a new type of Fe-based magnetic material.
Key words: Fe-Nd-Al alloy; bulk amorphous alloy; amorphous-forming ability, hard magnetic properties; mechanical properties
