Structure Characterization of Amorphous Al_(83)Ni_(10)Ce_5Si_2 under the Relaxed Annealing~1

摘要

In order to trace the structure evolution of amorphous Al_(83)Ni_(10)Ce_5Si_2 before crystallization,the alloy viscosity (zea)was measured by methods after annealing treatment at various temperatures.It is found that the alloy viscosity decreases initially and then increases with the annealing temperature.The X-ray diffraction (XRD)patterns show that the variation of the height of the main peak with annealing temperature (H_(max)-T)is similar to that of the viscosity versus annealing temperature (zea - 7),implying that the short-range order (SRO)in the amorphous alloy has changed.Additionally,the locations of the main peak and prepeak in the XRD curves move toward the high angle,implying that the characteristic spacing in the amorphous alloy decreases and that its volume decreases with the increase of the annealing temperature.The volume decrease is also confirmed by the development of the grooves on the free surface of the amorphous ribbon.