Characterization of nanocrystal dispersed Cu60Zr30Ti10 metallic glass

The microstructures of Cu60Zr30Ti10 metallic glass prepared by injection casting and melt -spinning have been investigated by transmission electron microscopy (TEM), and three dimensional atom probe ODAP). The as-cast 2 nun diameter rod sample contained Cu rich nanocrystals in the amorphous matrix. while the melt-spun ribbon was fully amorphous, The composition of the Cu-rich nanocrystals was around Cu70Zr10Ti5 with the fee structure (lattice parameter = 0.37 run). which is a metastable Cu phase supersaturated with Zr and Ti. Annealing the as-east rod at 713 K (T-g) for 10 min led to a decrease in compressive plastic strain from 1.8 to 0.6 accompanied by an increase in the volume freaction of the Cu-rich crystal.