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Continuous polyamorphic transition in high-entropy metallic glass

Authors :
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
Zhaoping Lu
Source :
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024)
Publication Year :
2024
Publisher :
Nature Portfolio, 2024.

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.

Subjects

Subjects :
Science

Details

Language :
English
ISSN :
20411723
Volume :
15
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Nature Communications
Publication Type :
Academic Journal
Accession number :
edsdoj.860ec3994d838356daac4c521389
Document Type :
article
Full Text :
https://doi.org/10.1038/s41467-024-51080-8