Abstract
The activity of silicon in liquid iron has been studied at 1560°C by mean of the equilibrium, SiO(g)+H2(g)=[Si]+H2O(g).
At concentrations up to Ns1=0.07 in Fe-Si System, the slope d In γsi/dNsi has aconstant value of ε(Si)Si=12.
By use of free energy of formation of silica determined by Bowles et al. at high temperature, the activity coefficient γ°Si at infinite dilution of silicon has been derived, and γ°Siis 8.7×10-4.
At concentrations up to Nv=0.05 in Fe-Si-V System, interaction parameter ε(V)Si has a value of 5.3.
