(1. 湖南大學(xué) 材料學(xué)院，長(zhǎng)沙 410083;
2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan)
摘 要: 利用普通的銅模鑄造制備了一系列富Fe的Fe-Nd-Al塊狀非晶合金，采用X射線衍射儀、差示量熱掃描儀、振動(dòng)樣品磁場(chǎng)儀和Instron萬能材料試驗(yàn)機(jī)研究了Fe-Nd-Al塊狀非晶合金的熱穩(wěn)定性、室溫磁性和力學(xué)性能。結(jié)果表明：Fe50Nd35Al15、Fe45Nd40Al15和Fe42.5Nd42.5Al15塊狀非晶合金的ΔTm (ΔTm=Tm−Tx)和晶化開始溫度(Tx)與熔點(diǎn)(Tm)的比值分別為106、90和64 K及0.88、0.90和0.93；其臨界尺寸分別為1.5、3和4 mm。此外，隨Fe含量的減少，大塊非晶的非晶形成能力和硬磁性能提高，但其力學(xué)性能有所下降。
關(guān)鍵字: Fe-Nd-Al合金；大塊非晶合金；非晶形成能力；熱穩(wěn)定性；硬磁性能；力學(xué)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
