Hydrogen Permeation Characteristics of Vanadium-Nickel Alloys

Nishimura, Chikashi; Komaki, M.; Amano, Muneyuki

doi:10.2320/matertrans1989.32.501

Cited by 121 publications

(47 citation statements)

References 33 publications

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“…9,10) The lms were sealed by Cu gaskets (outside and inside diameter: ϕ12.1 mm × ϕ5.2 mm), and then, hydrogen gas (99.9999%) with a pressure of 100-189 kPa and 100 kPa was introduced on the upstream side (P 1 ) and downstream side (P 2 ), respectively. Hydrogen gas passing through the Ni lm was measured by a mass ow meter (HORIBA MODEL SEF-E40; 20 mL/min) at 400 C, where the Pd alloy membranes are usually operated.…”

Section: )mentioning

confidence: 99%

High Thermal Stability and Flexibility of Thin Porous Ni Metal Support Prepared by Electroplating Deposition for Pd Alloy Membranes

et al. 2017

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A porous Ni lm with numerous through-holes was prepared by electroplating deposition for use as a novel metal support for Pd alloy membranes. The porous Ni lm with 5 μm thickness maintained its shape after calcination in air at 500 C for 1 h, which indicated its high thermal stability despite being electrodeposited. On the other hand, the calcined normal electrodeposited Ni crumbled and thus could not retain its original shape. The calcined porous Ni lm also showed high mechanical strength, as its displacement was twice that of the normal Ni lm. Hydrogen ow through the calcined porous Ni lm was much higher than that observed for an approximately 5 μm-thick Pd alloy membrane, thus demonstrating the potential application of the lm as a novel support for Pd alloy membranes in hydrogen production.

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Section: )mentioning

confidence: 99%

High Thermal Stability and Flexibility of Thin Porous Ni Metal Support Prepared by Electroplating Deposition for Pd Alloy Membranes

et al. 2017

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“…From the viewpoint of the hydrogen permeability for this demand, group 5A metals such as V, Nb, and Ta are promising candidates, because the hydrogen permeability of such metals is higher than those of Pd and Pd-Ag alloys. [1][2][3] However, since these metals suffer from severe hydrogen embrittlement, they cannot be used as membranes at present. Recently, one of the authors found out that the Nb-Ti-Ni alloy consists of bcc-(Nb, Ti) + B2-TiNi eutectic microstructures with an appropriate combination of high-hydrogen permeability and excellent hydrogen embrittlement resistance.…”

Section: Introductionmentioning

confidence: 99%

Electron Microscopy Study of Eutectic Structure in Nb-Ti-X and Nb-Zr-X (X = Co, Ni) Hydrogen Permeation Alloys

et al. 2008

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“…This is because they are less expensive and possess higher hydrogen permeability than Pd-based alloys. [7][8][9][10][11] However, a brittle fracture likely occurs during the operation under high pressure H 2 gas atmosphere which impedes the practical use of these alloy membranes. 6,12 Recently, the mechanical properties of niobium (Nb) and vanadium (V) membranes in hydrogen gas atmosphere at high temperature have been investigated by the in situ small punch (SP) test method.…”

Section: Introductionmentioning

confidence: 99%

“…5 Recently, there has been a great demand for the development of new hydrogen permeable alloys to reduce the material cost as well as to improve the hydrogen permeability. [6][7][8][9][10][11] Nb-based and V-based alloys are promising materials for hydrogen permeable membrane to be substituted for currently used Pd-based alloys. This is because they are less expensive and possess higher hydrogen permeability than Pd-based alloys.…”

Section: Introductionmentioning

confidence: 99%

Consistent description of hydrogen permeation through metal membrane based on hydrogen chemical potential and its application to alloy design

2016

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A consistent description of the hydrogen permeation through metal membrane based on hydrogen chemical potential proposed has been explained in detail. The hydrogen flux is proportional to the PCT factor, f PCT , consistently, which reflects the shape of the pressure-composition-isotherm (PCT curve) of the material. In addition, in view of the PCT factor, f PCT , and the ductile-to-brittle transition hydrogen concentration, DBTC, a concept for alloy design with high hydrogen permeability and strong resistance to hydrogen embrittlement has been proposed. In this concept, it is important to design alloy composition with appropriate PCT curve under the given pressure and temperature condition. As an example, V-9 mol% Al alloy has been designed, which exhibits high hydrogen flux without brittle fracture under given condition. Thus, the new consistent description is useful not only for the understanding of the hydrogen permeation property but also for the alloy design.

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Hydrogen Permeation Characteristics of Vanadium-Nickel Alloys

Cited by 121 publications

References 33 publications

High Thermal Stability and Flexibility of Thin Porous Ni Metal Support Prepared by Electroplating Deposition for Pd Alloy Membranes

High Thermal Stability and Flexibility of Thin Porous Ni Metal Support Prepared by Electroplating Deposition for Pd Alloy Membranes

Electron Microscopy Study of Eutectic Structure in Nb-Ti-X and Nb-Zr-X (X = Co, Ni) Hydrogen Permeation Alloys

Consistent description of hydrogen permeation through metal membrane based on hydrogen chemical potential and its application to alloy design

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