Continuous polyamorphic transition in high-entropy metallic glass

Yihuan Cao, Ming Yang, Qing Du, Fu-Kuo Chiang, Yingjie Zhang, Shi-Wei Chen, Yubin Ke, Hongbo Lou, Fei Zhang, Yuan Wu, Hui Wang, Suihe Jiang, Xiaobin Zhang, Qiaoshi Zeng, Xiongjun Liu () and Zhaoping Lu ()
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Yihuan Cao: University of Science and Technology Beijing
Ming Yang: University of Science and Technology Beijing
Qing Du: University of Science and Technology Beijing
Fu-Kuo Chiang: Shenhua NICE
Yingjie Zhang: University of Science and Technology Beijing
Shi-Wei Chen: National Synchrotron Radiation Research Center Hsinchu
Yubin Ke: Dongguan
Hongbo Lou: Center for High Pressure Science and Technology Advanced Research
Fei Zhang: Chinese Academy of Sciences
Yuan Wu: University of Science and Technology Beijing
Hui Wang: University of Science and Technology Beijing
Suihe Jiang: University of Science and Technology Beijing
Xiaobin Zhang: University of Science and Technology Beijing
Qiaoshi Zeng: Center for High Pressure Science and Technology Advanced Research
Xiongjun Liu: University of Science and Technology Beijing
Zhaoping Lu: University of Science and Technology Beijing

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Polyamorphic transition (PT) is a compelling and pivotal physical phenomenon in the field of glass and materials science. Understanding this transition is of scientific and technological significance, as it offers an important pathway for effectively tuning the structure and property of glasses. In contrast to the PT observed in conventional metallic glasses (MGs), which typically exhibit a pronounced first-order nature, herein we report a continuous PT (CPT) without first-order characteristics in high-entropy MGs (HEMGs) upon heating. This CPT behavior is featured by the continuous structural evolution at the atomic level and an increasing chemical concentration gradient with temperature, but no abrupt reduction in volume and energy. The continuous transformation is associated with the absence of local favorable structures and chemical heterogeneity caused by the high configurational entropy, which limits the distance and frequency of atomic diffusion. As a result of the CPT, numerous glass states can be generated, which provides an opportunity to understand the nature, atomic packing, formability, and properties of MGs. Moreover, this discovery highlights the implication of configurational entropy in exploring polyamorphic glasses with an identical composition but highly tunable structures and properties.

Date: 2024
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DOI: 10.1038/s41467-024-51080-8

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