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Solubility of nitrogen in alpha vanadium from 600 deg to 1200 deg C.
Henry-JL; O'Hare-SA; McCune-RA; Krug-MP
J Less-Common Met 1971 Sep; 25(1):39-47
Alloy specimens in the vanadium-rich region of the vanadium-nitrogen system were prepared by the reaction of high-purity vanadium foil and nitrogen. Specimens were annealed, quenched, and examined by x- ray and metallographic techniques to determine the degree of nitrogen solubility in a vanadium. Solubility was determined as a function of temperature at equilibrium pressure. Equilibrium pressures were not measured. Nitrogen solubility is found to be 1.15 wt pct at 600 deg C, 1.65 wt pct at 800 deg C, 2.20 wt pct at 1000 deg C, and 2.95 wt pct at 1200 deg C. A sluggish transformation is observed between 500 deg and 600 deg C for alloys having nitrogen, contents above 1 wt pct. It is likely that a peritectoid compound having a composition near v13n is formed. The composition range of the hexagonal beta phase could not be established accurately because of the small difference in lattice dimensions between the vanadium-saturated and nitrogen-saturated compound. The range is narrow, probably lying between VN0.32 and VN0.36 and does not appear to vary within the temperature range 300 deg to 1000 deg C.
Metals; Metallurgical-processes; Metallurgy; Vanadium-compounds
OP; Journal Article
Issue of Publication
Journal of the Less-Common Metals
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division