铝基非晶的液体脆性、热稳定性、非晶形成能力和中程序的的成分相关性

he Al-Ni-Ce based amorphous alloys are presented to study compositional dependence of glass-forming ability (GFA), crystallization behavior, thermal stability, medium-range order (MRO) and liquid fragility. The GFA of Al87Ni8Ce5 and Al84Ni8Ce5X3 amorphous alloys ranks as follows: Al84Ni8Ce5Co3> Al84Ni8Ce5Fe3> Al84Ni8Ce5Mg3> Al84Ni8Ce5Cu3> Al87Ni8Ce5> Al84Ni8Ce5Si3, which have the same tendency with the ratio of the prepeak area to the total area of the main peak in the X-ray intensity curve (Sprepeak/Stotal). That implies that the GFA has a good relation with the stable MRO structure. Better thermal stability (Ep1) and larger activation enthalpy for the glass transition (∆H*) corresponds to larger fragility parameter (m). That reflects that the thermal stability of metallic glasses and the stability of supercooled liquids are attributed to the strong–fragile characteristics of glass-forming liquids.