Development of melt-spun Ni–Nb–Zr–Co amorphous alloy for high-performance hydrogen separating membrane

Shimpo, Yoichiro; Yamaura, Shin Ichi; Nishida, Motonori; Kimura, Hisamichi; Inoue, Akihisa

doi:10.1016/j.memsci.2006.09.031

Cited by 53 publications

(19 citation statements)

References 18 publications

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“…Consistently with previous partial measurements, it is well evident that the peaks shift to lower temperature as the Zr content increases [18]. A similar decrease in the crystallization temperature with increasing Zr content was reported for Ni-Nb-Zr alloys, with the addition of Co [19]. Table 1 shows the temperature at which crystallization starts, T c,onset , defined as the temperature at which one observes the deviation from the linear background displayed by the DTA curves at low temperature.…”

Section: Changes Of the Physical Properties As A Function Of The Zr Csupporting

confidence: 90%

New Studies of the Physical Properties of Metallic Amorphous Membranes for Hydrogen Purification

et al. 2017

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Amorphous metallic membranes display promising properties for hydrogen purification up to an ultrapure grade (purity > 99.999%). The hydrogen permeability through amorphous membranes has been widely studied in the literature. In this work we focus on two additional properties, which should be considered before possible application of such materials: the propensity to crystallize at high temperatures should be avoided, as the crystallized membranes can become brittle; the hydrogen solubility should be high, as solubility and permeability are proportional. We investigate the crystallization process and the hydrogen solubility of some membranes based on Ni, Nb, and Zr metals, as a function of Zr content, and with the addition of Ta or B. The boron doping does not significantly affect the crystallization temperature and the thermal stability of the membrane. However, the hydrogen solubility for p~7 bar is as high as H/M~0.31 at T = 440 • C and H/M~0.27 at T = 485 • C. Moreover, the membrane does not pulverize even after repeated thermal cycles and hydrogenation processes up to 485 • C and 7 bar, and it retains its initial shape.

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Section: Changes Of the Physical Properties As A Function Of The Zr Csupporting

confidence: 90%

New Studies of the Physical Properties of Metallic Amorphous Membranes for Hydrogen Purification

et al. 2017

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“…The permeability after 24 h is 60% of the initial value. In contrast, both (Ni 0.6 Nb 0.4 ) 55 Zr 40 Co 5 amorphous alloy 16) and the (Ni 0.6 Nb 0.4 ) 70 Zr 30 amorphous alloy 20) degrade rapidly over time. The present result indicates that the Nb 42 Ni 32 Co 6 Zr 20 alloy membrane is very stable during the long term performance.…”

Section: Resultsmentioning

confidence: 96%

Hydrogen Permeable Nb-Based Amorphous Alloys with High Thermal Stability

et al. 2013

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In this work, the Nb-based Nb 42 Ni 40 Co 18¹x Zr x (x = 0, 4, 12) and Nb 42 Ni 32 Co 6 Zr 12 M 8 (M = Ta, Ti, Zr) amorphous alloy ribbons were successfully prepared by single roller melt-spinning technique. These amorphous alloys exhibit high thermal stability with the crystallization temperature (T x ) exceeding 850 K. It has been found that T x of the Nb 42 Ni 40 Co 18 alloy decreased with Zr addition, while hydrogen permeability increased linearly with Zr content. The hydrogen permeability of the Nb

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“…Earlier works have demonstrated that the hydrogen permeability of metallic glasses is strongly dependent on the constituent elements and alloy composition [7,[15][16][17][18]. Oji et al have reported that the local structure around the constituent elements in Ni-Nb-Zr-H amorphous alloys varied significantly with variations in the Zr content [19], which is believed to affect the hydrogen diffusion path and thus the permeability.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen permeability of glass-forming Ni-Nb-Zr-Ta crystalline membranes

et al. 2011

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A crystalline form of a glass-forming Ni-Nb-Zr-Ta alloy was studied as a hydrogen permeation membrane working in the temperature range from 573 K to 773 K. The crystalline membrane composed of an Nb-rich phase in an Ni 10 Zr 7 matrix demonstrated a hydrogen permeation property superior to the membrane of the same chemical composition with an amorphous structure and the values of the hydrogen permeability were found to exceed those of the Pd-based membranes. However, the mechanical stability deteriorated significantly such that all membranes failed during hydrogen permeation. This indicates a larger sensitivity to hydrogen embrittlement in comparison with the same alloy in an amorphous state.

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Development of melt-spun Ni–Nb–Zr–Co amorphous alloy for high-performance hydrogen separating membrane

Cited by 53 publications

References 18 publications

New Studies of the Physical Properties of Metallic Amorphous Membranes for Hydrogen Purification

New Studies of the Physical Properties of Metallic Amorphous Membranes for Hydrogen Purification

Hydrogen Permeable Nb-Based Amorphous Alloys with High Thermal Stability

Hydrogen permeability of glass-forming Ni-Nb-Zr-Ta crystalline membranes

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