Abstract
The microstructures of Cu 6 0 Zr 3 0 Ti 1 0 metallic glass prepared by injection casting and melt-spinning have been investigated by transmission electron microscopy (TEM), and three dimensional atom probe (3DAP). The as-cast 2 mm 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 Cu 7 6 Zr 1 9 Ti 5 with the fcc structure (lattice parameter a = 0.37nm), which is a metastable Cu phase supersaturated with Zr and Ti. Annealing the as-cast rod at 713 K (T g ) for 10min led to a decrease in compressive plastic strain from 1.8 to 0.6% accompanied by an increase in the volume fraction of the Cu-rich crystal.
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