Temperature Dependence of Ti Deoxidation Equilibria of Liquid Iron in Coexistence with 'Ti_3O_5' and Ti_2O_3

摘要

The equilibrium relation between Ti and 0 in liquid Fe has been measured only at 1 873 K on the condition of various kinds of titanium oxides saturation in our previous paper. The present work deals with the equilibrium between Ti and O in liquid Fe saturated with 'Ti_3O_5' and Ti_2O_3 at 1 823 K and 1 923 K for full understanding temperature dependence. Also, equilibrium phase changes of titanium oxides with various Ti contents in molten Fe have been identified as the equilibrium titanium oxides with electron backscatter diffraction (EBSD) pattern analysis technique. The present results have been thermodynamically evaluated combining with previous results on the various thermodynamic values as a function of temperature.rnThe equilibrium constants and the interaction parameters of Wagner's formalism were given as a function of temperature in the present work as follows.rnTi_2O_3(s) = 2Ti + 3OrnlogK_(Ti_2O_3)=-42 940/T + 12.94, (1823K