Characterization of the vanadium-nitrogen system with nitrogen pressure isobars

The partial thermodynamic functions of the V-N system from V to VN over the temperature range 1000 to 2100 K have been investigated. The discrepancies among the pressurecomposition-temperature (p-C-T) relationships in the DELTA-VN single-phase region have been resolved. The p-C-T relationships for other phases, where no data were available from the literature, have been established by applying the appropriate thermodynamic constraints and a modified form of Sieverts law. The results are presented as the nitrogen isobars superimposed on the phase diagram.