Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101526
Title: To understanding of slow and non-monotonic relaxation in Al–Y eutectic melts
Authors: Vasin, M. G.
Lebedev, V. G.
Issue Date: 2020
Publisher: Elsevier B.V.
Citation: Vasin M. G. To understanding of slow and non-monotonic relaxation in Al–Y eutectic melts / M. G. Vasin, V. G. Lebedev. — DOI 10.1016/j.jnoncrysol.2020.120131 // Journal of Non-Crystalline Solids. — 2020. — Vol. 543. — 120131.
Abstract: We discuss the nature of slow relaxation processes in glass-forming eutectic melts right after melting. For specific, we focus on the binary metallic melt Al–Y, which in addition to the slow relaxation shows unusual non-monotonic dynamics. We argue this slow dynamic the result of non-linearity of diffusion processes in the initially non-homogenous sample, and the nature of slow relaxation processes in eutectic melts after melting is similar to the nature of spinodal decomposition when the reason for the slowdown is the thermodynamic instability. To support this assertion we considered the model with combined Gibbs potential of the Al-Y liquid solution, in which the presence of the stoichiometric phase remains is taken into account. We show that in this system the instability mathematically described by the Cahn–Hilliard type equation can develop, and that fluctuation accounting in the considered model allows qualitatively describe the non-monotonic relaxation observed in the Al-based non-equilibrium melts. © 2020 Elsevier B.V.
Keywords: COMPOSITION FLUCTUATIONS
DIFFUSION
KINETICS
METALS AND ALLOYS
PHASE TRANSITIONS
THERMODYNAMIC MODELING
BINARY ALLOYS
EUTECTICS
MELTING
RELAXATION PROCESSES
SPINODAL DECOMPOSITION
YTTRIUM ALLOYS
DIFFUSION PROCESS
GIBBS POTENTIAL
GLASS-FORMING
LIQUID SOLUTION
METALLIC MELTS
NON EQUILIBRIUM
SLOW RELAXATIONS
THERMODYNAMIC INSTABILITY
ALUMINUM ALLOYS
URI: http://hdl.handle.net/10995/101526
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85085195879
PURE ID: 12901458
b56908fb-c55e-4173-9fd9-0bc8c656459a
ISSN: 223093
DOI: 10.1016/j.jnoncrysol.2020.120131
metadata.dc.description.sponsorship: The work was supported by the Russian Foundation for Basic Research , Grants 18-02-00643 (MV) and 18-42-180002 (VL). Part of the work was carried out within the framework of the state assignment of the Ministry of Education and Science of Russia (no. AAAA-A17-117022250039-4 ).
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