PARTIAL THERMODYNAMIC PROPERTIES OF THE TI-N SYSTEM

The partial thermodynamic functions of the Ti-N system over the temper ature range from 1500 K to 3200 K have been investigated using appropr iate thermodynamic constraints and congruent vaporization equilibria. The results are presented as the nitrogen isobars superimposed on the phase diagram. The discrepancy between the reported congruent vaporiza tion compositions in the delta-TiNc single-phase region has been resol ved. The Gibbs energies of solution of nitrogen dissolution in solid a nd liquid titanium are also determined with the assumption that nitrog en dissolution follows Sievert's law.