Metallic Glacial Glass Formation by a First-Order Liquid-Liquid Transition
- 20 August 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry Letters
- Vol. 11 (16), 6718-6723
- https://doi.org/10.1021/acs.jpclett.0c01789
Abstract
The glacial phase, with an apparently glassy structure, can be formed by a first-order transition in some molecular-glass-forming supercooled liquids. Here we report the formation of metallic glacial glass (MGG) from the precursor of a rare-earth-element-based metallic glass via the first-order phase transition in its supercooled liquid. The excellent glass-forming ability of the precursor ensures the MGG to be successfully fabricated into bulk samples (with a minimal critical diameter exceeding 3 mm). Distinct enthalpy, structure, and property changes are detected between MGG and metallic glass, and the reversed "melting-like" transition from the glacial phase to the supercooled liquid is observed in fast differential scanning calorimetry. The kinetics of MGG formation is reflected by a continuous heating transformation diagram, with the phase transition pathways measured at different heating rates taken into account. The finding supports the scenario of liquid-liquid transition in metallicglass-forming liquids.Funding Information
- Ministry of Science and Technology of the People's Republic of China (2018YFA0703603)
- National Natural Science Foundation of China (1790291, 51971238, 61888102, 61999102)
- Natural Science Foundation of Guangdong Province (2019B030302010)
- Chinese Academy of Sciences (XDB30000000)
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