Wagner interaction coefficient between nitrogen and chromium in liquid nickel-based alloys

The authors propose a simple theory of thermodynamic properties nitrogen solutions in liquid Ni–Cr alloys. This is completely analogous to the for alloys Fe–Cr and Fe –Mn systems proposed previously by 2019 2020. based on lattice model solutions. assumes FCC lattice. In sites this are atoms Ni Cr. Nitrogen located octahedral interstices. atom interacts only with metal neighboring it. interaction pairwise. It assumed that energy depends neither composition nor temperature. supposed system perfect. Within framework theory, relation obtained expresses Wagner coefficient between chromium nickel-based right-hand part appropriate formula function ratio Sieverts law constants solubility nickel. values these temperature 1873 K be K′(Cr) = 15,2; K′(Ni) 0,0015 wt. %. An estimate 21,4. corresponds value Langenberg –0,105, wich very close experimental estimates –0,108 (Surovoi et al., 1971) –0,11 1823 (Stomakhin at 1965).