Influence of Processing Techniques on the Surface Microstructure of V{sub 85}Ni{sub 15} Membrane Alloy

Journal Article · Sun Jul 15 04:00:00 EDT 2018 · Inorganic Materials

DOI:https://doi.org/10.1134/S0020168518070178· OSTI ID:22788057

Sidorov, N. I.; Petrova, S. A.; Shubin, A. B.; Pastukhov, E. A.; Fetisov, A. V. ^[1]; Esin, A. A. ^[2]; Vostryakov, A. A. ^[1]

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1. Russian Academy of Sciences, Institute of Metallurgy, Ural Branch (Russian Federation)
2. Ural Federal University (Russian Federation)

Vanadium-based alloys with a BCC structure are considered to be an alternative to palladium alloys for hydrogen purification. Since the performance of membranes is influenced by not only their bulk characteristics but also their surface condition, we have investigated the effect of different surface preparation techniques (abrasive grinding and polishing, electrolytic polishing, and ion etching) on the surface microstructure of V{sub 85}Ni{sub 15} membrane alloy using X-ray photoelectron spectroscopy. After electrolytic polishing and ion etching, we observed an increase in the percentages of vanadium and nickel metals in the surface layer of the alloy in comparison with its state after abrasive polishing. Such changes are expected to be favorable for an increase in the rate of hydrogen dissociation and recombination on the surface of the membrane material, eventually improving hydrogen transport efficiency.

• OSTI ID: 22788057
• Journal Information: Inorganic Materials, Journal Name: Inorganic Materials Journal Issue: 7 Vol. 54; ISSN INOMAF; ISSN 0020-1685
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABRASIVES
BCC LATTICES
DISSOCIATION
ETCHING
HYDROGEN
IONS
MICROSTRUCTURE
NICKEL
PALLADIUM ALLOYS
POLISHING
PURIFICATION
SURFACES
VANADIUM BASE ALLOYS
X-RAY PHOTOELECTRON SPECTROSCOPY