An Approach to Viscosity Calculations of Molten Iron and Its Dilute Binary Alloys

概要

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Accurate theoretical values of viscosities are not available at present. Therefore, in this paper we propose an approach to viscosity calculations of liquid metals and dilute binary alloys. Using the expression for liquid metals which has been derived by one of the authors, the calculated value of viscosity for molten iron at 1600℃ is equal to 4.7cP. From the expression and experimental data, we present an attempt to calculate viscosities of dilute binary alloys from simple parameters. That is, viscosities of dilute iron-based binary alloys are approximately proportional to the square root of the product of atomic weight and melting point (°K), (MT_m)^<1/2> of alloying elements. Viscosities of molten iron due to one atomic pecent of various alloying elements at 1600℃ are expressed as follows: [numberical formala] where, K≈3.5×10^<-5> (from experimental data). We have obtained same relation for liquid mercury and its dilute amalgams as well. Consequently, if the value K is obtained experimentally, the approximate values for viscosities of dilute alloys can be estimated.
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