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Teplofizika vysokikh temperatur, 2009, Volume 47, Issue 3, Pages 354–359
(Mi tvt814)
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This article is cited in 51 scientific papers (total in 51 papers)
Thermophysical Properties of Materials
The kinematic viscosity of liquid copper-aluminum alloys
N. Yu. Konstantinova, P. S. Popel', D. A. Yagodin Urals State Pedagogical University
Abstract:
The method of damped torsional vibrations of crucible with liquid under investigation is used for measuring the temperature dependences of kinematic viscosity $\nu$ of $\text{Cu}_{100 - x}\text{Al}_x$ melts $(x = 0$–$100$ at.%$)$ in the range of temperatures $t$ between the liquidus and $1100$–$1450^{\circ}$C. Unlike the majority of such experiments, the measurements are performed both in the process of heating the sample after its melting and in the course of subsequent cooling. The branching of $\nu(t)$ curves corresponding to the foregoing modes is revealed below certain temperatures dependent on the composition of sample (viscosity hysteresis). The curves obtained under cooling have a simple exponential shape predicted by activation theories of viscous flow. The obtained temperature dependences are used for constructing isotherms of kinematic viscosity, on which maxima are observed in the vicinity of stoichiometric concentration of $\text{CuAl}_3$ and composition of $\text{Cu}$–$30$ at.% $\text{Al}$. For the same compositions, extrema are observed on the concentration dependence of activation energy of viscous flow.
Received: 11.04.2008
Citation:
N. Yu. Konstantinova, P. S. Popel', D. A. Yagodin, “The kinematic viscosity of liquid copper-aluminum alloys”, TVT, 47:3 (2009), 354–359; High Temperature, 47:3 (2009), 336–341
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https://www.mathnet.ru/eng/tvt814 https://www.mathnet.ru/eng/tvt/v47/i3/p354
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