AMORPHOUS ALLOY Al-Y-Ni FORMED BY MECHANICAL ALLOYING

摘要

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-richcomposition Al₈₀Y₁₅Ni₅ was formed after 70 h milling.The process of the amorphiza-tion was monitored by X-ray diffraction.The dependence of the amorphization on themilling intensity was also discussed.The results show that over milling with extra-highintensity has an unfavourable effect on amorphization of the system.