Solubility of Oxygen in Titanium-Containing Iron-Nickel Melts

摘要

The solubility of oxygen in titanium-containing iron-nickel melts is studied experimentally for the example of Fe-40% Ni alloy at 1873 K. The experiments yield values for the equilibrium constant of the reaction of titanium and oxygen dissolved in Fe-40% Ni melt (logAr(1)(Fe^40%Ni) = -15.17), the Gibbsenergy of that reaction (ΔG_((1)(Fe-40%Ni) = 543 360 J/mol), and the interaction parameters for those solutions(e_(Ti)(Fe-40%Ni)~O =-1-420; (e_(Ti)(Fe-40%Ni)~O =-0.472; e_(O(Fe-40%Ni)~(Ti) =0.116). For a broad range of alloy compositions in the Fe-Ni system, the equilibrium constant of the reaction of titanium and oxygen dissolved in the melt, the Gibbs energy of that reaction, and the interaction parameters for those solutions are calculated at 1873 K. The solubility of oxygen in titanium-containing iron-nickel melts is determined at 1873 K. The reducing properties of titanium fall with increase in the Ni content to 40% and then increase sharply with further increase in the melt's Ni content.