Abstract:
We have studied the temperature and the temporal dependences of the viscosity of quasi crystalforming AlAl–CuCu–FeFe melts within the range of ii-phase (Al62Cu25.5Fe12.5)(Al62Cu25.5Fe12.5) stoichiometry with a change in the concentration of copper from 15.515.5 to 35.535.5 at %% and in that of iron from 2.52.5 to 2222 at %% as well as within the concentration range in which the ii-phase is the first to arise from the Al59.5+xCu35.5−xFe5Al59.5+xCu35.5−xFe5 melt (x=0(x=0–15)15). We show for the studied alloys that prolonged (22 h or longer) relaxation processes take place directly after melting in the conditions of the viscosimetric experiment and that they should be taken into account when the temperature dependences of the viscosity are measured. In the equilibrium thermodynamic conditions, the viscosity polytherms coincide for the heating and the cooling regimes; they are monotonous and are well described by the exponential dependence. The activation energy of the viscous flow, depending on the composition, varies from 1818 to 3636 kJ/mol.
The work was performed according to the R&D theme no. AAAA-A16-116021010084-2 and was partly supported by the Ural Branch Foundation for Basic Research, project no. 15-17-2-9.
Citation:
L. V. Kamaeva, A. Yu. Korepanov, V. I. Lad'yanov, “Temperature behavior of the viscosity of quasi crystal-forming AlAl–CuCu–FeFe melts”, TVT, 56:4 (2018), 527–532; High Temperature, 56:4 (2018), 514–518
\Bibitem{KamKorLad18}
\by L.~V.~Kamaeva, A.~Yu.~Korepanov, V.~I.~Lad'yanov
\paper Temperature behavior of the viscosity of quasi crystal-forming $\rm Al$--$\rm Cu$--$\rm Fe$ melts
\jour TVT
\yr 2018
\vol 56
\issue 4
\pages 527--532
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\crossref{https://doi.org/10.31857/S004036440002717-2}
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\transl
\jour High Temperature
\yr 2018
\vol 56
\issue 4
\pages 514--518
\crossref{https://doi.org/10.1134/S0018151X18040077}
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Linking options:
https://www.mathnet.ru/eng/tvt10875
https://www.mathnet.ru/eng/tvt/v56/i4/p527
This publication is cited in the following 3 articles:
L.V. Kamaeva, E.N. Tsiok, N.M. Chtchelkatchev, “Deep machine learning, molecular dynamics and experimental studies of liquid Al-Cu-Co alloys”, Journal of Molecular Liquids, 393 (2024), 123659
L. V. Kamaeva, R. E. Ryltsev, A. A. Suslov, N. M. Chtchelkatchev, “Effect of copper concentration on the structure and properties of al-cu-fe and al-cu-ni melts”, J. Phys.-Condes. Matter, 32:22 (2020), 224003
L. V. Kamaeva, R. E. Ryltsev, V. I. Lad'yanov, N. M. Chtchelkatchev, “Viscosity, undercoolability and short-range order in quasicrystal-forming al-cu-fe melts”, J. Mol. Liq., 299 (2020), 112207