Homogenization of a Metallic Melt: Enhancing the Thermal Stability of Glassy Metal
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F23%3A43897521" target="_blank" >RIV/44555601:13520/23:43897521 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2542529323000408?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2542529323000408?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mtphys.2023.101004" target="_blank" >10.1016/j.mtphys.2023.101004</a>
Alternative languages
Result language
angličtina
Original language name
Homogenization of a Metallic Melt: Enhancing the Thermal Stability of Glassy Metal
Original language description
Molding and thermoplastic processing of metallic glasses rely on using a homogenized state of the melt or supercooled liquid (structure inherited from the melt). To homogenize metallic melts, however, reaching the liquidus temperature is not sufficient, and the upper temperature for quenching is often chosen empirically. Here, it is proved experimentally via fast scanning calorimetry that the homogenization temperature of a prototyped Au-based metallic melt lies 192 K above its liquidus temperature of 663 K. The homogenized metallic melt has enhanced resistance to phase transformations, better thermal stability and improved glass-forming ability. The existence of a high-temperature miscibility gap, below which the melt spinodally decomposes, is the origin of a homogeneous-to-inhomogeneous crossover upon cooling the melt. When the initial quenching temperature is above a critical temperature delineating the existence of the miscibility gap and a high cooling rate is applied, the homogeneous melt structure is preserved in the metallic glass. Consequently, the glass shows suppressed crystallization on reheating. The enhanced thermal stability of the supercooled liquid promises practical engineering applications such as in thermoplastic forming, additive manufacturing or welding. The present study not only evidences the existence of a high-temperature miscibility gap in the multicomponent glass-forming alloy but also offers an alternative route to improve the thermal properties of metallic glasses for engineering applications.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/LM2018124" target="_blank" >LM2018124: Nanomaterials and Nanotechnologies for Environment Protection and Sustainable Future</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials Today Physics
ISSN
2542-5293
e-ISSN
2542-5293
Volume of the periodical
31
Issue of the periodical within the volume
Neuveden
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
"nestrankovano"
UT code for WoS article
000935404400001
EID of the result in the Scopus database
2-s2.0-85149058911