Preparation and properties of novel Cu-based bulk metallic glasses Cu55-xZr37Ti8Inx

The glassy rods were successfully fabricated in the Cu-Zr-Ti-In alloy system by casting into a copper mold. The value of ΔTx reaches a maximum of 66 K for the BMG Cu50Zr37Ti8In5 alloy. The reasons for enhancing glass forming ability of Cu-based BMGs with the addition of indium were discussed from atomic size and thermodynamics. Alternatively, the BMG Cu52Zr37Ti8In3 exhibits the highest compressive strength (1981 MPa) and the best plasticity among glassy Cu55-xZr37Ti8Inx (x≤5). The total plastic deformation of Cu52Zr37Ti8In3 before fracture approaches 1.2%.