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journal article·2024-06Open access

Unveiling the Structural Origins of Dynamic Diversity in Pd‐Based Metallic Glasses

Tianding Xu, Xiao‐Dong Wang, Eric M. Dufresne, Kevin A. Beyer, Pengfei An, Jingyuan Ma, Nan Wang, Suya Liu, Qing‐Ping Cao, Shao‐Qing Ding, Dong‐Xian Zhang, Lei Zheng, Jing Zhang, Tian‐Dou Hu, Zheng Jiang, Yuying Huang, Jian‐Zhong Jiang

Small· Volume 20· Issue 25
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Abstract

Abstract The β ‐relaxation is one of the major dynamic behaviors in metallic glasses (MGs) and exhibits diverse features. Despite decades of efforts, the understanding of its structural origin and contribution to the overall dynamics of MG systems is still unclear. Here two palladium‐based Pd─Cu─P and Pd─Ni─P MGs are reported with distinct different β ‐relaxation behaviors and reveal the structural origins for the difference using the advanced X‐ray photon correlation spectroscopy and absorption fine structure techniques together with the first‐principles calculations. The pronounced β ‐relaxation and fast atomic dynamics in the Pd─Cu─P MG mainly come from the strong mobility of Cu atoms and their locally favored structures. In contrast, the motion of Ni atoms is constrained by P atoms in the Pd─Ni─P MG, leading to the weakened β ‐relaxation peak and sluggish dynamics. The correlation of atomic dynamics with microscopic structures provides a way to understand the structural origins of different dynamic behaviors as well as the nature of aging in disordered materials.
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Research context

Ceramics & glasses

OpenAlex topics: Material Dynamics and Properties · Metallic Glasses and Amorphous Alloys · Theoretical and Computational Physics

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 State Key Laboratory of Silicon Materials, and School of Materials Science and Engineering Zhejiang University Hangzhou 310027 P. R. China

X‐ray Science Division Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA

Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China

Shanghai Synchrotron Radiation Facility Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Science Shanghai 201210 P. R. China

Thermo Fisher Scientific Inc. Shanghai 201210 P. R. China

State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 P. R. China

School of Materials Science and Engineering Fuyao University of Science and Technology Fuzhou 350109 P. R. China

Funding

National Natural Science Foundation of China

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