Abstract
The growth and decay kinetics of macroscopic hydrogen density modes in single crystals of niobium excited by an applied electric field was measured. The samples were prepared in-situ as to prevent incoherent precipitations. At a low hydrogen concentration (c=0.04 H/Nb) the diffusion coefficient and the effective charge agree well with results from experiments using polycrystalline samples. At a high hydrogen concentration (c=0.28 H/Nb) the electrotransport experiments could be extended into the unstable region of the incoherent phase diagram. The spinodal temperature obtained from the concentration amplitude (350±12 K) is significantly lower than the incoherent spinodal temperature. Important difficulties in evaluating electrotransport experiments at high hydrogen concentrations are discussed.
Similar content being viewed by others
References
Alefeld, G.: Phys. Status Solidi32, 67 (1969)
Wagner, H., Horner, H.: Adv. Phys.23, 587 (1974)
Bauer, H.C., Völkl, J., Tretkowski, J., Alefeld, G.: Z. Phys. B-Condensed Matter29, 17 (1978)
Zabel, H., Peisl, H.: Acta Metallogr.28, 589 (1980)
Wipf, H.: In: Hydrogen in Metals II. Topics in Applied Physics. Alefeld, G., Völkl, J. (eds.). Vol. 29. Berlin, Heidelberg, New York: Springer 1978
Maier-Bötzel, H., Platzer, W., Wagner, H.: Phys. Rev. B27 5173 (1983)
Bausch, R., Horner, H., Wagner, H.: J. Phys. C8, 2559 (1975)
Baier, Th., Wagner, H.: Z. Phys. B-Condensed Matter,78, 81 (1990)
Janssen, H.K.: Z. Phys. B-Condensed Matter23, 245 (1976)
Maier, W., Wipf, H.: Z. Phys. Chem. NF115, 129 (1979)
Erckmann, V., Wipf, H.: Phys. Rev. Lett.37, 341 (1976)
Verbruggen, A.H., Griessen, R.: Phys. Rev. B32, 1426 (1985)
Maier-Bötzel, H. Private communication
Mauger, P.E., Williams, W.D., Cotts, R.M.: J. Phys. Chem. Solids42, 821 (1981)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fenzl, W., Göttler, G., Schuppler, S. et al. Electrotransport in a coherent metal-hydrogen system. Z. Physik B - Condensed Matter 84, 229–235 (1991). https://doi.org/10.1007/BF01313541
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01313541