Phase formation and phase stability for the homogenous and heterogeneous amorphous metals versus the crystalline phase.

ABSTRACT: From molecular dynamics (MD) simulations of melt-quenching and thermal aging procedures in pure Ag, Cu, Ag-Cu binary alloys, and Cu-Zr binary alloys, we have identified two distinct amorphous phases for a metastable undercooled liquid: the homogeneous L-phase with low shear rigidity and the heterogenous G-phase with much higher shear rigidity and a heterogeneity length scale Λ. Here, we examine two-phase equilibration studies showing that the G-phase melts to form the L-phase above ~1,000 K, which then transforms to form the crystal (X) phase; however, below the melting point of the G-Phase (~990 K), the X- and G-phases do not transform into each other. We suggest the presence of a G-phase is likely responsible for embrittlement often observed in metallic glasses. We also consider how mech

SUBMITTER: Shen Y 

PROVIDER: S-EPMC11789084 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature