Two mathematical models for the hydrogen storage properties of AB2 type alloys

“…The model has been validated for different materials (Ti 1.05 Fe 0.8 Ni 0.15 Cr 0.05 , LaNi 2.5 Co 2.4 Si 0.1 , Zr (Fe 0.75 Cr 0.25 ) 2 ) [26,29]. This model provides simulation of all three phases (a, aeb and b) of PCI.…”

Section: Zhou's Modelmentioning

confidence: 99%

Experimental and theoretical studies on static and dynamic pressure–concentration isotherms of MmNi 5−x Al x ( x = 0, 0.3, 0.5 and 0.8) hydrides

Sharma

Kumar

Maiya

et al. 2014

International Journal of Hydrogen Energy

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“…At semi-empirical level, Li et al studied the hybrid characteristics of the Mg 2−x A x Ni 1−y B y alloy systems and illustrated the relationship between the macroscopic characteristics and atomic structures [38]. In addition, some mathematical models have been applied to selected hydrogen storage properties (formation enthalpy and hysteresis) of AB 2 -type alloys [39][40][41]. However, our current theoretical understanding on the multi-component alloys is still very limited.…”

Section: Introductionmentioning

confidence: 99%

Substitution effects on the hydrogen storage behavior of AB2 alloys by first principles

Zhao

Sun

2011

Front. Phys.

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The hydrogen storage behavior of the TiCr 2 and ZrCr 2 alloys substituted with the third components (Zr, V, Fe, Ni) have been studied using first-principles calculations. The change of the hydrogen absorption energies caused by metal doping is arising from the charge transfer among the doped alloys interior. Zr and V atoms devoted abundant electrons, leading to a great enhancement of the H absorption energy, while Fe and Ni atoms always accepted electrons, yielding a remarkable decrease of the H absorption energy. The hydrogen diffusion energy barrier is closely correlated with the geometry effect rather than the electronic structure.

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“…A synergetic effect is assumed between the two criteria. The difference in electronegativity among the elements of an alloy is directly related to its formation enthalpy (∆H) and its glass stability 8,9 . It is therefore reasonable to assume that the higher the average electronegativity difference among the elements, the higher the glass forming ability 6 .…”

Section: Introductionmentioning

confidence: 99%

Selection of compositions with high glass forming ability in the Ni-Nb-B alloy system

et al. 2012

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A combination of an extension of the topological instability "λ criterion" and the "average electronegativity" has been recently reported in the literature to predict compositions with high glass-forming ability (GFA). In the present work, both criteria have been applied to select the Ni 61.0 Nb 36.0 B 3 alloy with a high glass-forming ability. Ingots were prepared by arc-melting and were used to produce ribbons processed by the melt-spinning technique further characterized by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The Ni 61.0 Nb 36.0 B 3 alloy revealed a complete amorphization and supercooled liquid region ∆T x = 68 K. In addition, wedge-shaped samples were prepared using copper mold casting in order to determine the critical thickness for amorphous formation. Scanning electron microscopy (SEM) revealed that fully amorphous samples could be obtained, reaching up to ~800 µm in thickness.

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Two mathematical models for the hydrogen storage properties of AB2 type alloys

Cited by 52 publications

References 10 publications

Experimental and theoretical studies on static and dynamic pressure–concentration isotherms of MmNi 5−x Al x ( x = 0, 0.3, 0.5 and 0.8) hydrides

Experimental and theoretical studies on static and dynamic pressure–concentration isotherms of MmNi 5−x Al x ( x = 0, 0.3, 0.5 and 0.8) hydrides

Substitution effects on the hydrogen storage behavior of AB2 alloys by first principles

Selection of compositions with high glass forming ability in the Ni-Nb-B alloy system

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