New nanostructured phases with reversible hydrogen storage capability in immiscible magnesium–zirconium system produced by high-pressure torsion

Edalati, Kaveh; Emami, Hoda; Ikeda, Yûji; Iwaoka, Hideaki; Tanaka, Isao; Akiba, Etsuo; Horita, Zenji

doi:10.1016/j.actamat.2016.02.026

Cited by 79 publications

(57 citation statements)

References 67 publications

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“…Severe plastic deformation is an approach to synthesize bulk magnesium‐based hydrogen‐storage samples, and it can be realized by equal channel angular pressing (ECAP) or high‐pressure torsion (HPT) . Edalati et al.…”

Section: Approaches For Hydrogen‐storage Performance Enhancementmentioning

confidence: 99%

“…Edalati et al. reported that immiscible Mg−Zr and Mg−Ti alloy systems could be produced by HPT treatment under pressures of 1.5 or 3 GPa and showed certain hydrogen‐storage ability. The HPT‐treated Mg−Zr sample even reversibly absorbs and desorbs 1 wt % hydrogen at room temperature due to the Mg nanoclusters induced by HPT treatment.…”

Section: Approaches For Hydrogen‐storage Performance Enhancementmentioning

confidence: 99%

“…[55] Severe plasticd eformation is an approacht os ynthesize bulk magnesium-based hydrogen-storage samples,a nd it can be realized by equal channel angular pressing (ECAP) [56] or high-pressure torsion( HPT). [57,58] Edalati et al reported that immiscible MgÀZr [57] and MgÀTi [58] alloy systems could be produced by HPT treatment under pressureso f1 .5 or 3GPa and showedc ertain hydrogen-storage ability.T he HPT-treated MgÀZr sample even reversibly absorbs and desorbs 1wt% hydrogen at room temperature due to the Mg nanoclusters induced by HPT treatment.…”

Section: Synthetic Techniquesmentioning

confidence: 99%

See 2 more Smart Citations

Progress and Trends in Magnesium‐Based Materials for Energy‐Storage Research: A Review

Shao¹,

Lin

et al. 2017

Energy Tech

164

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For the realization of a hydrogen economy, one enabling technology is hydrogen storage. Magnesium‐based materials (MBMs) are very promising candidates for hydrogen storage due to the large hydrogen capacity and low cost. Challenges in the development of magnesium‐based hydrogen‐storage materials for various applications, particularly for onboard storage, are poor kinetics and unsuitable thermodynamics. Herein, new methods and techniques adopted by the researchers in this field are reviewed, with a focus on how different techniques could affect the hydrogen‐storage properties of MBMs, including kinetics and thermodynamics. Based on current progress, research trends in MBMs for various applications are introduced. Classical work from some pioneers, important milestones, and the latest development for these possible applications are summarized and future prospects in these fields are discussed.

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Section: Approaches For Hydrogen‐storage Performance Enhancementmentioning

confidence: 99%

Section: Approaches For Hydrogen‐storage Performance Enhancementmentioning

confidence: 99%

Section: Synthetic Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Progress and Trends in Magnesium‐Based Materials for Energy‐Storage Research: A Review

Shao¹,

Lin

et al. 2017

Energy Tech

164

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“…To get better activation, the HPT process was applied on the samples after HEBM. Earlier studies showed that the HPT method is not only effective to synthesize hydrogen storage materials but also to enhance the activation procedure . More details about the background of HPT can be found in the previous studies .…”

Section: Introductionmentioning

confidence: 99%

Mechanical Synthesis and Hydrogen Storage Characterization of MgVCr and MgVTiCrFe High‐Entropy Alloy

Marco

et al. 2019

Adv Eng Mater

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Body‐centered cubic (BCC) and high‐entropy alloys are being investigated as potential hydrogen storage materials due to their ability to absorb high amounts of hydrogen at moderate temperatures. Herein, the synthesis and hydrogen storage behavior of new MgVCr BCC and MgTiVCrFe high‐entropy alloys are studied. The alloys are initially synthesized by mechanical alloying via high‐energy ball milling (HEBM) under hydrogen atmosphere followed by high‐pressure torsion (HPT) processing to improve activation. X‐ray diffraction (XRD) in combination with transmission electron microscopy (TEM) shows a very refined nanostructure in both samples with the presence of a BCC solid solution phase for MgVCr, whereas the crystalline and amorphous phases coexist in MgTiVCrFe. The MgVCr alloy exhibits fast kinetics but with a low reversible hydrogen storage capacity (up to 0.9 wt%), whereas MgTiVCrFe shows low affinity to absorb hydrogen. Moreover, MgTiVCrFe demonstrates a partial decomposition from the initial structure by hydrogen storage cycling, whereas MgVcr exhibits reasonable stability.

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“…The synthesis of novel nanostructured alloys obtained from forced solid solutions in different immiscible systems (i.e., Cu-Ag, Cu-Fe, Cu-Co, Cu-Nb, Mg-Zr, Cu-Ag-Nb, and Ag-Cu-Ni) using high-pressure torsion (HPT) as the bulk processing technique has been the focus of several recent studies. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] These forced solid solutions are not only interesting from a scientific point of view but also for future technical applications. HPTdeformed supersaturated Mg-Zr phases, for example, showed reversible hydrogen storage capability at room temperature.…”

Section: Introductionmentioning

confidence: 99%

High strength nanocrystalline Cu–Co alloys with high tensile ductility

Bachmaier

Rathmayr²,

Schmauch

et al. 2018

J. Mater. Res.

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A supersaturated single-phase Cu-26 at.% Co alloy was produced by high-pressure torsion deformation, leading to a nanocrystalline microstructure with a grain size smaller than 100 nm. The nonequilibrium solid solution decomposed during subsequent isothermal annealing. In situ high-energy X-ray diffraction was used to map changes linked to the separating phases, and the development of a nanoscale Cu-Co composite structure was observed. To gain further information about the relationship of the microstructure and the mechanical properties after phase separation, uniaxial tensile tests were conducted on as-deformed and isothermally annealed samples. Based on the in situ diffraction data, different isothermal annealing temperatures were chosen. Miniaturized tensile specimens with a round cross section were tested, and an image-based data evaluation method enabled the evaluation of true stress-strain curves and strain hardening behavior. The main results are as follows: all microstructural states showed high strength and ductility, which was achieved by a combination of strain-hardening and strain-rate hardening.Andrea Bachmaier received her PhD in Materials Science at the University of Leobenin 2011. For her PhD research, she followed a novel strategy to produce supersaturated solidsolutions in immiscible alloy systems by a new two-step severe plastic deformation (SPD) process to obtain bulk specimens directly. Following graduation she spent two years in industry where she led a large research project funded by the Austrian Research Promotion Agency on advanced high-strength steels. In 2013, she was awarded an Erwin-Schrödinger scholarship that allowed her to work on the mechanisms behind bulk mechanical alloying, the decomposition process of supersaturated solid solutions and its influence on the thermal stability as well as on functional and mechanical properties. She leads a research group at the Erich Schmid Institute of Materials Science in Leoben Austria. Her current research primarily focuses on the generation of metastable materials, novel nanocomposites and nanocrystalline metal-matrix composites by SPD, and ERC Starting Grant funded program on SPD processed nanoscale magnetic materials. 58

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New nanostructured phases with reversible hydrogen storage capability in immiscible magnesium–zirconium system produced by high-pressure torsion

Cited by 79 publications

References 67 publications

Progress and Trends in Magnesium‐Based Materials for Energy‐Storage Research: A Review

Progress and Trends in Magnesium‐Based Materials for Energy‐Storage Research: A Review

Mechanical Synthesis and Hydrogen Storage Characterization of MgVCr and MgVTiCrFe High‐Entropy Alloy

High strength nanocrystalline Cu–Co alloys with high tensile ductility

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