Atomic‐Level Structural Characteristics of β ‐Relaxation in Metallic Glasses
Source abstract
Abstract
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 heating experiments provide evidence for the “irreversible” β ‐relaxation, which involves an event that is decayed during the sub‐ T g annealing; however, it can be reactivated by subsequent high temperature rejuvenation. The discovery paves a new pathway for the study of β ‐relaxation, unveiling the origin of β ‐relaxation based on experimental and theoretical structural analysis methods.
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Research context
OpenAlex topics: Material Dynamics and Properties · Metallic Glasses and Amorphous Alloys · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
International Center for New‐Structured Materials (ICNSM) Laboratory of New‐Structured Materials Zhejiang University Hangzhou 310027 China
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China
Shanghai Synchrotron Radiation Facility Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Science Shanghai 201210 China
State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China
National Synchrotron Radiation Research Center Hsin‐Ann Road, Hsinchu Science Park Hsinchu 30076 Taiwan
Key Laboratory of Silicon‐based Materials The Ministry of Education Key Laboratory of Automotive Glass of Fujian Smart Automotive Glass Engineering Research Center of Fujian and School of Materials Science and Engineering Fuyao University of Science and Technology Fuzhou 350109 China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province
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