Abstract
Composite membranes with a thin selective layer based on the Pd–46 at % Cu or Pd–5 at % Pb solid solution on the surface of a bilayer heterostructure with two-level porosity in the form of Kh18N10T steel/nanoporous titanium oxide (steel/rutile) are fabricated. The structure of the selective 4-μm-thick layer is found to have no through pores, and a metal does not penetrate into the nanopores in titanium oxide. The selective layer in both versions has a fine submicrocrystalline granular structure, which is caused by the presence of a second component in the Pd–Pb layer and by a two-phase composition of the Pd–Cu layer. In the temperature range 200–300°C, the hydrogen permeability of the membrane based on the two-phase Pd–Cu solid solution is higher than the membrane based on the Pd–Pb solid solution by a factor of 1.7–2.0.
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ACKNOWLEDGMENTS
This work was supported by the Ministry of Education and Science of the Russian Federation, project no. 4.7972.2017/8.9.
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Ievlev, V.M., Dontsov, A.I., Novikov, V.I. et al. Composite Membranes Based on Pd–Cu and Pd–Pb Solid Solutions. Russ. Metall. 2018, 854–858 (2018). https://doi.org/10.1134/S0036029518090070
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DOI: https://doi.org/10.1134/S0036029518090070