Atomic-Level Structural Characteristics of β-Relaxation in Metallic Glasses.

ABSTRACT: The β-relaxation is one of the crucial relaxation modes in glasses, which significantly influences their mechanical properties, structural heterogeneity, and glass transition. However, due to detection limitations, the β-relaxation has not been fully characterized and understood. In this work, in situ synchrotron radiation X-ray diffraction and absorption techniques are utilized to track the β-relaxation during heating and find that it can be reflected in the evolution of cluster structures within the first shells of metallic glasses. Through molecular dynamics simulations, it is further demonstrated that the β-relaxation is also well consistent with fast atomic motions linked with specific Voronoi polyhedra and chemical constitutions characterized by more excess free volume. The cyclic he

SUBMITTER: Xu T 

PROVIDER: S-EPMC12849962 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature