Achieving superior de-/hydrogenation properties of C15 Laves phase Y-Fe-Al alloys by A-side substitution

Li, Ziming; Wang, Hui; Ouyang, Liuzhang; Liu, Jiangwen; Zhu, Min

doi:10.1016/j.jallcom.2019.02.074

Cited by 14 publications

(4 citation statements)

References 47 publications

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“…124 However, due to the great properties tuning possibility via elemental modification, hydride destabilization has been successfully achieved. 127 A couple of AB 2 -type alloys form unstable hydrides (hydrides that present high equilibrium pressures at room temperature), which have been investigated for the hybrid hydrogen storage concept (in which hydrogen is stored as pressurized gas and in the hydride). 45,128,129 One interesting approach that has been investigated for improving the properties of these alloys (especially AB 2 -type alloys) is the introduction of disorder in the Laves structure via…”

Section: Review Energy and Environmental Sciencementioning

confidence: 99%

Review and outlook on high-entropy alloys for hydrogen storage

Marques

Balcerzak

Winkelmann

et al. 2021

Energy Environ. Sci.

187

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Section: Review Energy and Environmental Sciencementioning

confidence: 99%

Review and outlook on high-entropy alloys for hydrogen storage

Marques

Balcerzak

Winkelmann

et al. 2021

Energy Environ. Sci.

187

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“…Such a substitution of vanadium on A sites was reported not only to increase the degree of disorder but also to provide more hydrogen interstitial sites for reversible hydrogen storage [460,462]. More recently, this strategy of partial substitution on the A site was adopted to C15 Y(Fe,Al) 2 alloys by replacing 10% of Y by Zr, Ti, or V resulting in a remarkable increase of the hydrogen desorption capacity [463].…”

Section: Functional Applications 41 Hydrogen Storage Materialsmentioning

confidence: 99%

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

2020

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Laves phases with their comparably simple crystal structure are very common intermetallic phases and can be formed from element combinations all over the periodic table resulting in a huge number of known examples. Even though this type of phases is known for almost 100 years, and although a lot of information on stability, structure, and properties has accumulated especially during the last about 20 years, systematic evaluation and rationalization of this information in particular as a function of the involved elements is often lacking. It is one of the two main goals of this review to summarize the knowledge for some selected respective topics with a certain focus on non-stoichiometric, i.e., non-ideal Laves phases. The second, central goal of the review is to give a systematic overview about the role of Laves phases in all kinds of materials for functional and structural applications. There is a surprisingly broad range of successful utilization of Laves phases in functional applications comprising Laves phases as hydrogen storage material (Hydraloy), as magneto-mechanical sensors and actuators (Terfenol), or for wear- and corrosion-resistant coatings in corrosive atmospheres and at high temperatures (Tribaloy), to name but a few. Regarding structural applications, there is a renewed interest in using Laves phases for creep-strengthening of high-temperature steels and new respective alloy design concepts were developed and successfully tested. Apart from steels, Laves phases also occur in various other kinds of structural materials sometimes effectively improving properties, but often also acting in a detrimental way.

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“…%, corresponding to the hydride formula Y 0.65 Sc 0.3 Ni 2 H 2.93 . It is noted that the minimum dehydrogenation temperature of the Y 0.25 Sc 0.7 Ni 2 is much lower than that of Y(Zr)Fe 2 compounds [ 24 , 25 , 26 , 27 ]. Therefore, in addition to the improvement in the reversibility due to the reduced R A /R B , the Sc alloying also shows a significant promoting effect in the hydrogen sorption equilibrium pressure because of the reduced lattice constant.…”

Section: Resultsmentioning

confidence: 99%

“…Rare-earth-based compounds form the largest subset of the AB 2 -type Laves phase compounds [ 23 ], and their potential for hydrogen storage is worthy of more exploration to overcome the HIA problem by compositional and structural modification. Our previous studies show that the B-side substitution with Al and the A-side alloying with Zr could effectively inhibit the HIA and achieve reversible hydrogen storage [ 24 , 25 , 26 , 27 ]. The YFe 1.7 Al 0.3 delivers a reversible hydrogen storage capacity of 1.38 wt.%, but the complete hydrogen desorption must be conducted in a dynamic vacuum at 200 °C [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)0.95Ni2 Laves Phase Compounds

2021

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Rare-earth-based AB2-type compounds with Laves phase structure are readily subject to hydrogen-induced amorphization and disproportionation upon hydrogenation. In this work, we conducted the Sc alloying on Y0.95Ni2 to improve its hydrogen storage properties. The results show that the amorphization degree of Y0.95Ni2 deepens with the increasing hydrogenation time, pressure, and temperature. The Y(Sc)0.95Ni2 ternary compounds show a significant improvement in reversibility and dehydriding thermodynamics due to the reduced atomic radius ratio RA/RB and cell volume. Hydrogen-induced amorphization is fully eliminated in the Y0.25Sc0.7Ni2. The Y0.25Sc0.7Ni2 delivers a reversible hydrogen storage capacity of 0.94 wt.% and the dissociation pressure of 0.095 MPa at the minimum dehydrogenation temperature of 100 °C.

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Achieving superior de-/hydrogenation properties of C15 Laves phase Y-Fe-Al alloys by A-side substitution

Cited by 14 publications

References 47 publications

Review and outlook on high-entropy alloys for hydrogen storage

Review and outlook on high-entropy alloys for hydrogen storage

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)0.95Ni2 Laves Phase Compounds

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