Abstract
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 binary system. 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. Within the experimental temperature range of 1500° to 1725°C and the composition range of 0.10 <N Ti<0.90, the activity of titanium in the bcc (β) phase relative to pure titanium for the binary alloy is:RT lna Ti=RT lnN Ti+N 2V (1.82±0.13) kcal per g-atom while the activity of vanadium is:RT lna V=RT lnN V+N 2Ti (1.82±0.13) kcal per g-atom.
The experimental result on the pairwise interaction parameter agrees well with the theoretically calculated value.
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EDMUND J. ROLINSKI, formerly Graduate Student, Department of Materials Science and Metallurgical Engineering, University of Cincinnati, Cincinnati, Ohio
This paper is based upon a portion of a thesis submitted by EDMUND J. ROLINSKI submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Materials Science at the University of Cincinnati.
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Rolinski, E.J., Hoch, M. & Oblinger, C.J. Determination of thermodynamic interaction parameters in solid V-Ti alloys using the mass spectrometer. Metall Trans 2, 2613–2618 (1971). https://doi.org/10.1007/BF02814902
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DOI: https://doi.org/10.1007/BF02814902