High-entropy induced a glass-to-glass transition in a metallic glass

Hengwei Luan, Xin Zhang, Hongyu Ding, Fei Zhang, J. H. Luan, Z. B. Jiao, Yi-Chieh Yang, Hengtong Bu, Ranbin Wang, Jialun Gu, Chunlin Shao, Qing Yu, Yang Shao (), Qiaoshi Zeng (), Na Chen (), C. T. Liu and Ke-Fu Yao ()
Additional contact information
Hengwei Luan: Tsinghua University
Xin Zhang: Center for High Pressure Science and Technology Advanced Research
Hongyu Ding: Tsinghua University
Fei Zhang: Center for High Pressure Science and Technology Advanced Research
J. H. Luan: City University of Hong Kong
Z. B. Jiao: The Hong Kong Polytechnic University
Yi-Chieh Yang: Tsinghua University
Hengtong Bu: Tsinghua University
Ranbin Wang: Tsinghua University
Jialun Gu: Tsinghua University
Chunlin Shao: Peking University
Qing Yu: City University of Hong Kong
Yang Shao: Tsinghua University
Qiaoshi Zeng: Center for High Pressure Science and Technology Advanced Research
Na Chen: Tsinghua University
C. T. Liu: City University of Hong Kong
Ke-Fu Yao: Tsinghua University

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Glass-to-glass transitions are useful for us to understand the glass nature, but it remains difficult to tune the metallic glass into significantly different glass states. Here, we have demonstrated that the high-entropy can enhance the degree of disorder in an equiatomic high-entropy metallic glass NbNiZrTiCo and elevate it to a high-energy glass state. An unusual glass-to-glass phase transition is discovered during heating with an enormous heat release even larger than that of the following crystallization at higher temperatures. Dramatic atomic rearrangement with a short- and medium-range ordering is revealed by in-situ synchrotron X-ray diffraction analyses. This glass-to-glass transition leads to a significant improvement in the modulus, hardness, and thermal stability, all of which could promote their applications. Based on the proposed high-entropy effect, two high-entropy metallic glasses are developed and they show similar glass-to-glass transitions. These findings uncover a high-entropy effect in metallic glasses and create a pathway for tuning the glass states and properties.

Date: 2022
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DOI: 10.1038/s41467-022-29789-1

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