Structure and hydrogen permeability of V–15Ni alloy

A. Baraban, I. Gabis, S. Kozhakhmetov, M. Murzinova, V. Piven, N. Sidorov, I. Sipatov, A. Voyt

Результат исследований: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

The structure of the V–15Ni at.% alloy before and after hydrogen permeability tests was investigated by means of XRD and SEM with EDS analysis. We have found that decomposition of supersaturated V-based solid solution with variable Ni content occurred during testing. The volume fraction of the solid solution decreased and the fraction of V3Ni phase increased during permeability testing, thus bringing the alloy to nearly equilibrium. The membrane without Pd coating showed satisfactory hydrogen fluxes with a significant impact of the surface dissociation rate of hydrogen. The shape of hydrogen permeation curves at the downstream side of the membrane at various temperatures was unusual. We attribute it to the high concentration of dissolved hydrogen in the metal lattice and its effect on the hydrogen diffusivity and solubility. In addition, the multiphase structure with non-uniform distribution of nickel both between the phases and within the BCC solid solution (and, consequently, different hydrogen concentrations) may cause dilatation or compressing effect on neighbouring micro-volumes of the alloy.

Язык оригиналаанглийский
Страницы (с-по)27492-27498
ЖурналInternational Journal of Hydrogen Energy
Том44
Номер выпуска50
Ранняя дата в режиме онлайн21 сен 2019
DOI
СостояниеОпубликовано - 18 окт 2019

Предметные области Scopus

  • Возобновляемые источники энергии и окружающая среда
  • Технология топлива
  • Физика конденсатов
  • Энергетическая технология

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  • Цитировать

    Baraban, A., Gabis, I., Kozhakhmetov, S., Murzinova, M., Piven, V., Sidorov, N., Sipatov, I., & Voyt, A. (2019). Structure and hydrogen permeability of V–15Ni alloy. International Journal of Hydrogen Energy, 44(50), 27492-27498. https://doi.org/10.1016/j.ijhydene.2019.08.224