Hydrogen isotope electromigration and impurity effect in vanadium

• Published in: Journal of alloys and compounds Vol. 282; no. 1; pp. 38 - 43
• Main Authors: Fujii, K., Hashizume, K., Hatano, Y., Sugisaki, M.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 1999; Elsevier
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Diffusion in solids; Electromigration; Exact sciences and technology; Hydrogen isotopes; Impurity effect; Mass dependence; Metals. Metallurgy; Physics; Transport properties of condensed matter (nonelectronic); Vanadium; Electromigration; Hydrogen isotopes; Mass dependence; Impurity effect; Vanadium; Mass; Temperature dependence; Impurities; Transition elements; Hydrogen additions; Electrodiffusion; Isotopic species; Experimental study; Impurity trapping; Effective charge; Concentration distribution
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(98)00827-5

The effective charge of protium and tritium in the α-phase of vanadium has been measured by means of a stationary state electromigration experiment in a temperature region from 323 to 523 K. The obtained results have shown a definite mass dependence such as Z *(T)> Z *(H) in a lower temperature region and a tendency that the effective charge of H and T approaches a same value in a higher temperature region. By comparing this result with the data for protium and deuterium previously reported by other investigators, we have concluded a mass dependence according to the sequence Z *(T)> Z *(D)> Z *(H) in a lower temperature region. The origins of this mass dependence has been discussed by decomposing the effective charge into the direct and wind charges. The trapping effect due to a small zirconium impurity in the investigated vanadium specimen on the electromigration of hydrogen isotopes has been also examined and the trapping model has been discussed.