Influences of Similar Elements on Glass Forming Ability and Magnetic Properties in Al-Ni-La Amorphous Alloy

Guihua Li, Weimin Wang , Xiufang Bian, Li Wang, Jiteng Zhang, Rui Li and Tao Huang Key Laboratory for Liquid-Solid Structureal Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China

摘 要：Similar element substitution has been applied for improving glass forming ability （GFA） in Al 86 Ni 9 La 5 amorphous alloy. The effects of La-Ce and Ni-Co pairs on the GFA, magnetic properties and hardness of Al-Ni-La alloy were investigated by using X-ray diffraction （XRD）, transmission electron microscopy （TEM）, differential scanning calorimetry （DSC）, magnetometer and hardness-tester. The results show the GFA of the samples in the order of Al 86 （Ni 0.5 Co 0.5 ） 9 （La 0.5 Ce 0.5 ） 5 < Al 86 Ni 9 La 5 <Al 86 Ni 9 （La 0.5 Ce 0.5 ） 5 , implying that similar element substitution has a limited enhancing effect on the GFA of the present Al-Ni-La alloy. In addition, the measured samples display a diamagnetic behavior at room temperature. The variations of diamagnetic behavior as well as the microhardness of the samples are strongly dependent on the microstructure, i.e., the amounts of the icosahedral structure and precipitates, after the similar element substitution in the Al-Ni-La alloy.

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