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

Journal Article · · Nature Communications

AbstractGlass-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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); National Key Basic Research and Development Program; National Natural Science Fund for Excellent Young Scholars; CityU; Jiangsu Natural Science Foundation
Grant/Contract Number:
AC02-06CH11357; 51871129; 51771096; 51871054; 2016YFB00300500; 51922053; 9360161; BK20190979
OSTI ID:
1867464
Alternate ID(s):
OSTI ID: 1870005
Journal Information:
Nature Communications, Vol. 13, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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