Inhomogeneous Amorphous Structure Of Bulk Metallic Glasses Examined From Structural Relaxation Kinetics

摘要

The kinetics of structural relaxation in fragile glass former, Pd_(46)Cu_(.5.5)P_(18.5) BMG, and strong glass former, Zr_(50)Cu_(40)Al_(10) BMG, was investigated by volume relaxation. The former exhibited a relaxation phenomenon that is well understood by the local topological instability model, while the latter showed monotonous relaxation behavior over a wide range down to T-g-60 K. The discrepancy may be closely related to the difference in the fragility of both glasses.