Structural state and thermodynamic stability of Al Cu alloys

Filonenko, N.Yu. (2020) Structural state and thermodynamic stability of Al Cu alloys. International Journal of Modern Physics B, V. 34 (№ 8). 20500-1-20500-11. ISSN 0217-9792, 1793-6578

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Abstract

It is known that processes occurring in binary system melts affect the crystallization process and the phase composition of alloys. To predict these processes, we should determine the region of thermodynamic stability of the melt. In this paper, the structural properties of hypoeutectic and hypereutectic alloys in Al–Cu system are studied depending on the heating temperature above the liquidus line and aftercooling rate. It is shown that overheating of Al–Cu melts to 150 K above the liquidus line and further cooling leads to complete suppression of the process of formation of primary aluminum crystals in hypoeutectic alloys and Al2Cu phase in hypereutectic alloys. For the first time, by accounting in Gibbs energy of binary Al–Cu alloy for the first degree approximation of high-temperature expansion of thermodynamic potential, the dependence of temperature of line of the melt thermodynamic stability on copper content in alloy is obtained.

Item Type:	Article
Uncontrolled Keywords:	Al–Cu alloys; Al2Cu phase; eutectics; thermodynamic stability of a liquid.
Subjects:	Physics
Divisions:	Departments > Department of Medical and Biological Physics and Informatics
Depositing User:	Аліна Чеботарьова
Date Deposited:	01 Sep 2020 10:11
Last Modified:	01 Sep 2020 10:13
URI:	http://repo.dma.dp.ua/id/eprint/5657

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