Decoupling between calorimetric and dynamical glass transitions in high-entropy metallic glasses.

ABSTRACT: Glass transition is one of the unresolved critical issues in solid-state physics and materials science, during which a viscous liquid is frozen into a solid or structurally arrested state. On account of the uniform arrested mechanism, the calorimetric glass transition temperature (T_g) always follows the same trend as the dynamical glass transition (or α-relaxation) temperature (T_α) determined by dynamic mechanical analysis (DMA). Here, we explored the correlations between the calorimetric and dynamical glass transitions of three prototypical high-entropy metallic glasses (HEMGs) systems. We found that the HEMGs present a depressed dynamical glass transition phenomenon, i.e., HEMGs with moderate calorimetric T_g represent the highest T_α and the max

SUBMITTER: Jiang J 

PROVIDER: S-EPMC8219663 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature