Estimation of Viscosities of Liquid Alloys
1992 Volume 78 Issue 3 Pages 399-406
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1992 Volume 78 Issue 3 Pages 399-406
The effects of composition and temperature on viscosities of liquid metals have been studied by systematical analysis of data from the literatures in order to estimate the viscosities of liquid alloys. The viscosities of liquid alloys are expressed by the following equations:
η=A exp (B/RT) [mPa·s]
A=1.7×10-4ρ2/3Tm1/2M-1/6/exp(B/RTm) [mPa·s]
B=2.65 Tm1.27 [J·mol-1]
where ρ is the density of alloy [kg·m-3], Tm is the absolute temperature of liquidus [K], M is atomic weight [kg·mol-1], and R is gas constant [8.3144 J·mol-1·K-1]. Calculated values from the above equations for the viscosities of various liquid binary alloys were in good agreement with their experimental data from the literatures. Using these equations, it will be possible to estimate viscosity for any liquid alloy at any temperature.
