Structure and Properties of Ni–Al Alloys in the Liquid State
- Авторы: Tyagunov A.1, Baryshev E.1, Tyagunov G.1, Shmakova K.1, Mushnikov V.1
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Учреждения:
- Ural Federal University
- Выпуск: Том 2019, № 2 (2019)
- Страницы: 139-141
- Раздел: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/172954
- DOI: https://doi.org/10.1134/S0036029519020277
- ID: 172954
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Аннотация
The structure and the properties of liquid Ni–Al alloys have been studied in a wide temperature range. An analysis of the temperature dependences of the physical and chemical properties of these alloys has discovered a hysteresis phenomenon, i.e., discrepancy between heating and cooling polytherms. This discrepancy is called the temperature hysteresis. A physical model of the Ni–Al alloy structure is proposed on the basis of a quasi-chemical model for a nonequilibrium melt structure. The liquid metal is found to be in a nonequilibrium state after melting. It contains NixAl-type microgroups with a strong Ni–Al bond and fcc-like structure and microgroups with weaker Ni–Ni bonds. The sizes and the life times of these clusters decrease after melting (above the liquidus temperature). The NixAl-type clusters disappear as the melt temperature becomes higher than a critical temperature. The melt transforms from a microinhomogeneous state into an equilibrium state.
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Об авторах
A. Tyagunov
Ural Federal University
Email: e.e.baryshev@urfu.ru
Россия, Yekaterinburg, 620002
E. Baryshev
Ural Federal University
Автор, ответственный за переписку.
Email: e.e.baryshev@urfu.ru
Россия, Yekaterinburg, 620002
G. Tyagunov
Ural Federal University
Email: e.e.baryshev@urfu.ru
Россия, Yekaterinburg, 620002
K. Shmakova
Ural Federal University
Email: e.e.baryshev@urfu.ru
Россия, Yekaterinburg, 620002
V. Mushnikov
Ural Federal University
Email: e.e.baryshev@urfu.ru
Россия, Yekaterinburg, 620002
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