Interaction in (Ti,Sc)Fe2–H2 and (Zr,Sc)Fe2–H2 systems

Zotov, T. A.; Movlaev, E. A.; Митрохин, С.В.; Verbetsky, V.N.

doi:10.1016/j.jallcom.2007.05.027

Cited by 41 publications

(29 citation statements)

References 12 publications

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“…4b, the midpoint of the plateau for the ␣ → ␤ transformation during the first deuteration is observed at ∼560 bar D 2 for ZrFe 1.98 Al 0.02 , and at ∼410 bar for ZrFe 1.96 Al 0.04 . These pressures are significantly reduced as compared to the ZrFe 2 -H 2 system, where the first H absorption plateau at room temperature is above 1 kbar, at 1120 bar [16]. (b) On the second and further absorption cycles, the equilibrium pressure of hydrogen absorption is significantly reduced, to 690 bar for ZrFe 2 -H 2 [16] and to 430 bar for the ZrFe 1.98 Al 0.02 -D 2 systems.…”

Section: Zrfe 2−x Al X -D 2 Systemmentioning

confidence: 96%

“…These pressures are significantly reduced as compared to the ZrFe 2 -H 2 system, where the first H absorption plateau at room temperature is above 1 kbar, at 1120 bar [16]. (b) On the second and further absorption cycles, the equilibrium pressure of hydrogen absorption is significantly reduced, to 690 bar for ZrFe 2 -H 2 [16] and to 430 bar for the ZrFe 1.98 Al 0.02 -D 2 systems. (c) A pronounced hysteresis between the D 2 pressures of desorption and absorption during the first charge-discharge cycle.…”

Section: Zrfe 2−x Al X -D 2 Systemmentioning

confidence: 97%

“…This value is very close to the experimentally observed maximum hydrogen absorption capacity of the ZrFe 2 intermetallic alloy of 3.5 at.H/f.u. at 1800 bar and room temperature [16]. For the NPD studies, the absorption was performed at room temperature without preliminary activation of the as-cast samples (0.5-1 mm).…”

Section: Zrfe 2−x Al X -D 2 Systemmentioning

confidence: 99%

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High pressure in situ diffraction studies of metal–hydrogen systems

Yartys

Denys

Webb

et al. 2011

Journal of Alloys and Compounds

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Section: Zrfe 2−x Al X -D 2 Systemmentioning

confidence: 96%

Section: Zrfe 2−x Al X -D 2 Systemmentioning

confidence: 97%

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High pressure in situ diffraction studies of metal–hydrogen systems

Yartys

Denys

Webb

et al. 2011

Journal of Alloys and Compounds

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“…The in situ P-C measurements proved that hydrides of both ZrCo 2 and ZrFe 2 , formed under high hydrogen pressure are thermodynamically unstable and decompose when kept without contact with air [12,16]. However, there is substantial difference between behavior of both hydrides when left in contact with air at room temperature [10,11].…”

Section: Hydrides Of Zrco 2−x Fe X Intermetallic Compoundsmentioning

confidence: 99%

“…• C the equilibrium absorption/desorption pressures for ZrFe 2 -H 2 system were much lower -only 69.9/32.9 MPa(H 2 ) [12]. Consequently it seemed attractive to modify thermodynamic parameters of hydride formation by substituting one or both components of the parent alloy by another metal.…”

Section: Introductionmentioning

confidence: 99%

Hydrides Formed in ZrCo2 – Based Intermetallic Compounds Under High Hydrogen Pressure / Wodorki Wytwarzane Pod Wysokimi Cisnieniami Wodoru Ze Zwiazków Miedzymetalicznych Na Osnowie ZrCo2

Filipek¹,

Liu²,

Kuriyama³

et al. 2013

Archives of Metallurgy and Materials

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The hydrides of zirconium based pseudobinary alloys Zr(Co 1−x T x ) 2 , (T = Fe, V or Cr) and Zr 1−x R x Co 2 (R = Y, La, Pr) were synthesized under 1.2 GPa of hydrogen pressure. It was revealed that partial substitution of cobalt by V, Cr or Fe increases hydrogen absorption capacity and stability of derived hydrides. Especially, it was found that ZrCo 1.8 V 0.2 alloy exposed to high hydrogen pressure can absorb 50% more hydrogen than pure ZrCo 2 and the hydride ZrCo 1.8 V 0.2 H y has surprisingly high stability. Substitution of zirconium by Y, La or Pr in ZrCo 2 alloys improved hydrogen absorption but hydrides derived from La and Pr substituted alloys were less stable than ZrCo 2 H 2 . Only for Zr 0.7 Y 0.3 Co 0.2 H y the hydrogen absorption was higher and desorption rate markedly smaller comparing ZrCo 2 H 2 .Keywords: Hydrides, High hydrogen pressure, Laves phasesPod wysokim ciśnieniem wodoru rzędu 1.2 GPa otrzymano szereg wodorków na osnowie pseudobinarnych stopów cyrkonu o następujących składach: Zr(Co 1−x T x ) 2 , (T = Fe, V or Cr) oraz Zr 1−x R x Co 2 (R = Y, La, Pr). Wykazano, że częściowe podstawienie kobaltu wanadem, chromem lub żelazem zwiększa zdolność absorpcyjną stopów i stabilność tworzących się wodorków. W szczególności okazało się, że pod wysokim ciśnieniem wodoru ZrCo 1.8 V 0.2 absorbuje o 50% więcej wodoru aniżeli ZrCo 2 , a co więcej otrzymany z tego stopu wodorek ma nieoczekiwanie wysoką stabilność. Częściowe zastąpienie cyrkonu itrem, lantanem lub prazeodymem podwyższało wprawdzie zdolność absorpcyjną wodoru ale jednocześnie otrzymane wodorki zawierające lantan lub prazeodym były mniej stabilne aniżeli ZrCo 2 H 2 . Jedynie dla Zr 0.7 Y 0.3 Co 0.2 H y odnotowano wyższą absorpcję wodoru i niższą szybkość jego desorpcji aniżeli w przypadku ZrCo 2 H 2 .

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Hydrogen storage properties of Ti_1−xSc_xMnCr Laves phase alloys

et al. 2012

Int. J. Energy Res.

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SUMMARY The hydrogen storage properties of Ti1−xScxMnCr (x = 0.05, 0.10, 0.15, 0.22, 0.27 and 0.32) alloys are studied by pressure‐composition isotherms at 0–60 °C and 1 kPa–4 MPa. The relevant crystal structures of the alloys and their hydrides are examined by the X‐ray diffraction and electron microscopy. The alloys are basically C14 type Laves phase with slightly different lattice parameters owing to the difference in composition. Except for x = 0.05 alloy, the bulk samples of these alloys can be easily activated under ambient conditions and attain the maximum hydrogen storage capacities during the initial hydrogenation. As Sc content increases, the hydrogen storage capacity of the alloy increases whereas the pressure of the absorption/desorption plateau decreases. No hydrogen‐induced disproportionation is observed, and the hydrogen‐induced defects and pulverization are not severe after hydriding/dehydriding cycles of these alloys. The Ti0.78Sc0.22MnCr alloy exhibits the best reversible hydrogen storage capacity of ~2 wt% in between 1 and 4000 kPa at room temperature. Except for the x = 0.32 alloy, the average thermodynamic values of |ΔH| and |ΔS| in the system increase approximately linearly with Sc content in the alloys. The thermogravimetry‐differential scanning calorimetry (TG‐DSC) on desorption of the hydride of Ti0.68Sc0.32MnCr indicates that the thorough release of hydrogen in the alloy can be achieved at 658 K. Copyright © 2012 John Wiley & Sons, Ltd.

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Interaction in (Ti,Sc)Fe2–H2 and (Zr,Sc)Fe2–H2 systems

Cited by 41 publications

References 12 publications

High pressure in situ diffraction studies of metal–hydrogen systems

High pressure in situ diffraction studies of metal–hydrogen systems

Hydrides Formed in ZrCo2 – Based Intermetallic Compounds Under High Hydrogen Pressure / Wodorki Wytwarzane Pod Wysokimi Cisnieniami Wodoru Ze Zwiazków Miedzymetalicznych Na Osnowie ZrCo2

Hydrogen storage properties of Ti_1−xSc_xMnCr Laves phase alloys

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Interaction in (Ti,Sc)Fe2–H2 and (Zr,Sc)Fe2–H2 systems

Cited by 41 publications

References 12 publications

High pressure in situ diffraction studies of metal–hydrogen systems

High pressure in situ diffraction studies of metal–hydrogen systems

Hydrides Formed in ZrCo2 – Based Intermetallic Compounds Under High Hydrogen Pressure / Wodorki Wytwarzane Pod Wysokimi Cisnieniami Wodoru Ze Zwiazków Miedzymetalicznych Na Osnowie ZrCo2

Hydrogen storage properties of Ti1−xScxMnCr Laves phase alloys

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Hydrogen storage properties of Ti_1−xSc_xMnCr Laves phase alloys