Effects of microadditions on glass transition and hardness of Cu-based bulk metallic glasses

摘要

In this paper, glass-forming ability, viscosity, fragility and microhardness of three Cu-based bulk metallic glasses are evaluated by differential scanning calorimetry, thermomechanical analysis and hardness testing. The results suggest that Y element can effectively affect the packing state and properties of Cu-based bulk metallic glasses. The variation of glass-forming ability, viscosity, fragility index and hardness indicates that alloying with low quantity of additions can remarkably change the characteristic temperatures during glass transition stage but cannot cause an apparent modification in the solidification/melting stage.