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采用熔体急冷法制备了Al_(90)Ni_2Y_8和Al_(84)Ni_8Y_8合金条带,并用XRD进行了结构表征,用差示扫描量热仪分析了合金的热稳定性,使用超导量子干涉仪对Al_(90)Ni_2Y_8和Al_(84)Ni_8Y_8非晶态及部分晶化态合金的磁性进行了研究.结果表明,Al_(90)Ni_2Y_8和Al_(84)Ni_8Y_8非晶合金为抗磁性,而且随着Ni含量的增加,合金更容易被磁化.当磁场强度达到0.5T时,Al_(90)Ni_2Y_8合金对应的比磁化强度为-0.083 Am~2/kg,磁化率为-1.66×10~(-5),而Al_(84)Ni_8Y_8合金对应的比磁化强度为-0.091 Am~2/kg,磁化率为-1.82×10~(-5).当合金部分晶化后,合金的磁性仍保持抗磁性,但是比磁化强度的绝对值均显著增加.当磁场强度为0.5 T时,Al_(90)Ni_2Y_8合金对应的比磁化强度的绝对值从急冷态的0.083 Am~2/kg增大到部分晶化后的0.231 Am~2/kg,Al_(84)Ni_8Y_8对应的比磁化强度的绝对值从急冷态的0.091 Am~2/kg增大到部分晶化后的0.163 Am~2/kg,对应的磁化率绝对值分别变为4.62×10~(-5)和3.26×10~(-5),说明合金部分晶化后更易被磁化.这是由于部分晶化后,铁磁性的Ni元素和可增强磁性的Y元素在纳米Al晶体周围显著富集,形成磁性较强的短程有序结构造成的.
The strip of Al 90 Ni 2 Y 8 and Al 84 Ni 8 Y 8 alloy was prepared by melt quenching method and characterized by XRD. The thermal stability of the alloy was analyzed by differential scanning calorimeter. The superconducting quantum interferometer The magnetic properties of amorphous and partially crystalline alloys of Al_ (90) Ni_2Y_8 and Al_ (84) Ni_8Y_8 were studied. The results show that the amorphous alloys of Al_ (90) Ni_2Y_8 and Al_ (84) Ni_8Y_8 are antimagnetism, When the magnetic field strength reaches 0.5T, the corresponding magnetization of Al 90 Ni 2 Y 8 alloy is -0.083 Am 2 / kg and the magnetic susceptibility is -1.66 × 10 ~ (-1) 5), while the corresponding magnetization of Al_ (84) Ni_8Y_8 alloy is -0.091 Am ~ 2 / kg and its magnetic susceptibility is -1.82 × 10 ~ (-5) .After the alloy is partially crystallized, However, the absolute value of specific magnetization increases significantly.When the magnetic field strength is 0.5 T, the absolute value of specific magnetization of Al 90 Ni 2 Y 8 alloy increases from 0.083 Am 2 / kg in the quenched state to that of the partially crystalline The absolute value of the specific magnetization of 0.231 Am ~ 2 / kg and Al_ (84) Ni_8Y_8 increased from 0.091 Am ~ 2 / kg in the cold state to 0.163 Am ~ 2 / kg after the partial crystallization The absolute values of magnetic susceptibility change to 4.62 × 10 -5 and 3.26 × 10 -5, respectively, which indicates that the alloy is more susceptible to magnetization after partial crystallization, which is due to the partial crystallization of ferromagnetic Ni and The Y-element that enhances the magnetism is significantly enriched around the nano-Al crystal, resulting in a strong magnetic short-range ordered structure.