Thermodynamics of Vanadium Alloys. Part I. Mass Spectrometric Determination of Thermodynamic Properties of Vanadium-Titanium Alloys

摘要

The Knudsen effusion method was combined with a mass spectrometer sensing technique in order to measure thermodynamic quantities of solid solution alloys of V-Ti in the b.c.c. (beta) phase. The technique makes use of the regular solution model in order to treat the vaporization data in terms of ion current ratios obtained from the mass spectrometer. The internal consistency between the data was demonstrated by calculating the relative electron impact ionization cross sections and found to agree with previously reported calculated results. The pairwise interaction parameter for the V-Ti binary alloys was found to be 1.82 plus or minus 0.13 Kcal/g-atom for the experimental temperature range of 1500 to 1725C and for .10