Affiliation:
1. Ural Federal University
Abstract
We analyzed the temperature dependences of the kinematic viscosity and density of Fe73.5Cu1M3Si13.5B9 melts, where M = Nb, Mo, V, and Cr, in the temperature range from 1450 to 1950 K using the transition state theory. It is shown that the activation energy of viscous flow is proportional to the particle size on a natural logarithmic scale. The lowest viscosity and the highest free volume has the Nb melt. In melts with Mo, V, and Cr, the structural units of viscous flow upon heating and cooling are clusters about 0.6 nm in size. In a melt with Nb, at the initial stage of heating, the vibrations of individual atoms prevail, the movement of which creates viscosity. After heating the Nb melt above the critical temperature of 1770 K, the viscous flow is associated with clusters about 1 nm in size. At the cooling stage, the cluster structure of the Nb melt is retained up to a temperature of 1450 K.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Radiation
Reference15 articles.
1. M. Calvo-Dahlborg, P.S. Popel, M.J. Kramer, M. Besser, J.R. Morris, U. Dahlborg, Superheat-dependent microstructure of molten Al-Si alloys of different compositions studied by small angle neutron scattering, J. Alloys Comp. 550 (2013) 9-22.
2. Ye.A. Kochetkova, Yu.N. Starodubtsev, V.S. Tsepelev, Kinematic viscosity of melt prepared from an amorphous Fe72.5Cu1Nb2Mo1.5Si14B9 ribbon, IOP Conf. Ser.: Mater. Sci. Eng. 969 (2020), 012027.
3. B.A. Baum, Metal Liquids, Nauka, Moscow, (1979).
4. H.D. Koca, S. Doganay, A. Turgut, I.H. Tavman, R. Saidur, I.M. Mahbubul, Effect of particles size on viscosity of nanofluids: a review, Renew. Sust. Energy Rev. 82 (2018) 1664-1674.
5. S. Glasstone, K.J. Laidler, H. Eyring, The Theory of Rate Processes. The Kinetics of Chemical Reactions, Viscosity, Diffusion and Electrochemical Phenomena, McGraw-Hill Book Co., New York, London, (1941).
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