Abstract
The diffusion coefficient and electrotransport effective charge number of hydrogen and deuterium in V, , and were measured as a function of temperature using resistance techniques. Measurements were performed for hydrogen (deuterium) concentrations of approximately 1 at.% and alloys with and . Alloying vanadium with either titanium or chromium was found to lower both and over the entire temperature range studied (310-480 K). The diffusion data obey an Arrhenius relation, the alloys having larger activation energies for diffusion than pure vanadium. No currently existing microscopic theory seems capable of explaining the dependence of on alloy composition, nor can the data be consistently explained by a simple two-state trapping model. In every sample, was observed to decrease with increasing temperature and host-metal resistivity for both hydrogen and deuterium. In addition, was found to be larger for deuterium than hydrogen.
- Received 28 February 1983
DOI:https://doi.org/10.1103/PhysRevB.28.641
©1983 American Physical Society