On the Miscibility Gap in the Iron-Chromium-Vanadium Ternary System

The effect of vanadium addition on the miscibility gap in the iron-chromium binary system has been investigated by means of differential thermal analysis and Moessbauer effect measurements. The miscibility gap obtained experimentally in the iron-chromium-vanadium ternary system are qualitatively in agreement with that predicted from thermo-dynamical data of three binary systems, iron-chromium, iron-vanadium and chromium-vanadium system.The ternary tie-lines has been determined by means of the Moessbauer measurements of the binary and ternary alloys aged at 480°C. It has been found that when the ternary tie-lines are extrapolated the lines cut the iron-chromium binary line at the point at which the chromium content is nearly 90 at%.