The amorphization transformation of Al-Y-Ni system by mechanical alloying was inves- tigated in both thermodynamic and kinetic aspects.The amorphous powder of Al-rich composition Al_(80)Y_(15)Ni_5 was formed after 70 h milling.The process of the amorphiza- tion was monitored by X-ray diffraction.The dependence of the amorphization on the milling intensity was also discussed.The results show that over milling with extra-high intensity has an unfavourable effect on amorphization of the system.
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