| The effects of yttrium addition on the glass forming ability (GFA) of the Cu- and Ti-based alloys have been investigated. It is found that yttrium addition can dramatically enhance GFA in Cu-based alloy and a Ti-base alloys, and minor addition of yttrium, can destabilize the Cu10Zr7, CuZr and Laves phase in Cu- and Ti-based alloys, respectively. The atomic level strain energy is closely related to the atomic packing efficiency of the precipitated crystals. The prediction correlates well with the experimental results that less yttrium addition is needed to suppress the precipitation of crystal phase with the higher atomic packing efficiency. |
full paper (pdf, 102 Kb)