Deoxidation Equilibrium of Silicon in the Nickel-Cobalt Melts

Abstract

Abstract The oxygen solutions in the Ni-Co melts containing silicon have been thermodynamically analyzed. The activity coefficients at infinite dilution and the interaction parameters in the Ni-Co alloys at 1873 K are calculated. The oxygen solubility depending on the silicon content in the studied alloys are obtained. Silicon is characterized by the high affinity to oxygen in these alloys. The deoxidation ability of silicon decreases slightly with an increase in the cobalt content in melt. In the Ni-Co alloys with more than 20% of cobalt, at a silicon concentration of less than 0.5%, the deoxidation ability of silicon is virtually unchangeable.