Hydrogen storage properties of Mg/Cu and Mg/Pd laminate composites and metallographic structure

Takeichi, Nobuhiko; Tanaka, Koji; Tanaka, Hideaki; Ueda, T.; Kamiya, Yoshihisa; Tsukahara, Makoto; Miyamura, Hiroshi; Kikuchi, Shiomi

doi:10.1016/j.jallcom.2007.04.220

Cited by 87 publications

(50 citation statements)

References 13 publications

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“…For Mg-Pd system, Dufour and Huot have shown that cold rolled samples have a much better air contamination resistance than the same material prepared by ball milling [23].Takeichi et al [39] as well as Dufour and Huot [22] have also shown that the alloy Mg 6 Pd could be synthesized by cold rolling followed by heat treatment. Other Mg-X systems such as Mg-Ti [21,40], Mg-Al [41], Mg-Cu [39,42], Mg-Fe [11,13] as well as commercial Mg-Zr-Zn alloy [43] have been investigated. Figure 7 shows the evolution of texture in cold rolled magnesium.…”

Section: Cold Rolling Of Magnesiummentioning

confidence: 99%

Application of Severe Plastic Deformation Techniques to Magnesium for Enhanced Hydrogen Sorption Properties

Huot

Skryabina

Fruchart

2012

Metals

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Abstract:In this paper we review the latest developments in the use of severe plastic deformation (SPD) techniques for enhancement of hydrogen sorption properties of magnesium and magnesium alloys. Main focus will be on two techniques: Equal Channel Angular Pressing (ECAP) and Cold Rolling (CR). After a brief description of these two techniques we will discuss their effects on the texture and hydrogen sorption properties of magnesium alloys. In particular, the effect of the processing temperature in ECAP on texture will be demonstrated. We also show that ECAP and CR have produced different textures. Despite the scarcity of experimental results, the investigations up to now indicate that SPD techniques produce metal hydrides with enhanced hydrogen storage properties.

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Section: Cold Rolling Of Magnesiummentioning

confidence: 99%

Application of Severe Plastic Deformation Techniques to Magnesium for Enhanced Hydrogen Sorption Properties

Huot

Skryabina

Fruchart

2012

Metals

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“…ARB was also investigated as a mean to improve the activation of magnesium and its alloys 24,33,34,35,36 . Even though ECR does not refine the grain size at the same level, it may lead Mg-alloys to have good H 2 storage properties because of the presence of preferential texture in the direction of the (002) basal plane of Mg 24,37,38,39 . The deformation of metals by ECR occurs under high friction and in a non-homogeneous way through their thickness because of the introduction of large amounts of redundant shear-strain on the material's surface 40 .…”

Section: Introductionmentioning

confidence: 99%

Severe Plastic Deformation and Additive Distribution in Mg-Fe to Improve Hydrogen Storage Properties

et al. 2017

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Magnesium (Mg) is a light metal with relatively low cost. Its hydride (MgH 2 ) is interesting for the safe hydrogen storage in solid state and has a high gravimetric capacity of 7.6%. Practical application of Mg is still hampered by high reaction temperatures and slow kinetics. In order to improve it and focus on more viable industrial processing conditions, Mg plates, with or without iron (Fe) addition, in the form of wires and powders, were submitted to severe plastic deformation (SPD) in air, starting with extensive cold rolling (ECR), followed by repetitive rolling (ARB). The samples were characterized by X-ray diffraction (XRD), optical microscopy (OM), scanning (SEM) and transmission electron microscopy (TEM). H 2 storage properties were evaluated by differential scanning calorimetry (DSC) and Sievert's volumetric method. Mg processed by ECR+ARB resulted in larger grain refinement and densities of cracks than ECR. In addition, Fe in the form of continuous wires was fragmented and resulted in a better distribution of particles than powders, which agglomerated. Thus, finally, the synergetic effect of microstructural features and Fe as catalyst and its distribution improved activation, kinetics and hydrogen storage capacity.

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“…18) This unique structure improves the diffusion rate of the metallic elements and hydrogen, and increases the kinetics of hydrogen absorption/desoption. 19) Therefore, Mg 6 Pd can absorb and desorb hydrogen reversibly at 573 K, in spite of the complex multistage disproportionation and recombination reactions of Mg and Pd that occur. A detailed study of the micro/nano-structure of Mg/Pd laminate composites is underway.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Storage Properties and Corresponding Phase Transformations of Mg/Pd Laminate Composites Prepared by a Repetitive-Rolling Method

Takeichi

Tanaka

et al. 2007

Mater. Trans.

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Mg/Pd laminate composites (Mg/Pd = 6) prepared by a repetitive-rolling method can reversibly absorb and desorb a large amount of hydrogen, up to 1.47 H/M (4 mass%) at 573 K. Pressure-composition isotherms of the Mg/Pd laminate composites show two plateaux, P L ¼ 0:2 MPa and P H ¼ 2 MPa, during hydrogen absorption and desorption. To clarify the correlation between hydrogen storage properties and phase transformations, we investigated structural changes of the Mg 6 Pd intermetallic compound with in-situ XRD. The low-pressure plateau P L corresponds to the decomposition of Mg 6 Pd into Mg 5 Pd 2 and MgH 2 , and the high-pressure plateau P H to the decomposition of Mg 5 Pd 2 into MgPd and MgH 2 . In subsequent dehydrogenation processes, part of the MgH 2 reformed Mg, and the Mg and MgPd form Mg 5 Pd 2 at the highpressure plateau P H and then the remaining MgH 2 reformed Mg, and the Mg and Mg 5 Pd 2 form Mg 6 Pd at the low-pressure plateau P L . According to this mechanism, the Mg 6 Pd can absorb and desorb hydrogen through reversibly disproportionation and recombination processes.

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Hydrogen storage properties of Mg/Cu and Mg/Pd laminate composites and metallographic structure

Cited by 87 publications

References 13 publications

Application of Severe Plastic Deformation Techniques to Magnesium for Enhanced Hydrogen Sorption Properties

Application of Severe Plastic Deformation Techniques to Magnesium for Enhanced Hydrogen Sorption Properties

Severe Plastic Deformation and Additive Distribution in Mg-Fe to Improve Hydrogen Storage Properties

Hydrogen Storage Properties and Corresponding Phase Transformations of Mg/Pd Laminate Composites Prepared by a Repetitive-Rolling Method

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