摘要

Al(85)Ni(5)Y(10-x)Co(x) (x=0,2) and Cu(46)Zr(54-x)Al(x) (x=0, 7) metallic glasses (MG(s)) have been examined using fluctuation electron microscopy (FEM). Strong medium-range order (MRO) was revealed in both MG systems. Minor additions of Co into the Al(85)Ni(5)Y(10) and Al into the Cu(46)Zr(54), forming Al(85)Ni(5)Y(8)Co(2) and Cu(46)Zr(47)Al(7) MGs, render the medium-range structure more homogeneous. This is in a good agreement with the increase of glass-forming ability in these two systems.