Statistical Thermodynamic Analysis for Isothermal Hydrogenation Performances of Mg&lt;SUB&gt;2-&lt;/SUB&gt;&lt;SUB&gt;y&lt;/SUB&gt;Pr&lt;SUB&gt;y&lt;/SUB&gt;Ni&lt;SUB&gt;4&lt;/SUB&gt;Intermetallics (&lt;i&gt;y&lt;/i&gt; = 0.6, 0.8, 1.0)

Shohoji, Nobumitsu

doi:10.5923/j.ijmc.20120203.02

Cited by 2 publications

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References 21 publications

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“…Statistical thermodynamic analysis procedures were comprehensively summarized by Fowler Statistical thermodynamic parameters evaluated for extensive range of interstitial non-stoichiometric compounds including hydride, carbide, nitride, phosphide and sulfide were compiled in a monograph published by the author [2] that included calculation results reported by 2012 [3]- [46]. All these analyses [2]- [48] were made accepting an a priori assumption of constant interaction energy ( ) E X X − between nearest-neighbour interstitial atoms X within a homogeneity composition range of MX x lattice at arbitrary T. Parameter values estimated for M's in the same group in the Periodic Table of the Elements for given X were comparable to each other.…”

Section: Introductionmentioning

confidence: 99%

Characterizing Atomic Interactions in Interstitial Non-Stoichiometric Compounds by Statistical Thermodynamics: Engineering Usage of Estimated Values of Statistical Thermodynamic Parameters

Shohoji¹

2017

JMP

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Statistical thermodynamics allows us to estimate atomistic interactions in interstitial non-stoichiometric compounds MX x through analysis of experimentally determined pressure-temperature-composition (PTC) relationships for MX x being in equilibrium with X 2 in gaseous state () How to cite this paper: Shohoji, N. (2017) Characterizing Atomic Interactions in Interstitial Non-Stoichiometric Compounds by Statistical Thermodynamics: Engineering

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Section: Introductionmentioning

confidence: 99%

Characterizing Atomic Interactions in Interstitial Non-Stoichiometric Compounds by Statistical Thermodynamics: Engineering Usage of Estimated Values of Statistical Thermodynamic Parameters

Shohoji¹

2017

JMP

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Suppressed Hydrogen (H) Solubility in Body Centered Cubic Vanadium (V) by Alloying with Molybdenum (Mo), Chromium (Cr), Iron (Fe) or Cobalt (Co) Appreciated in Terms of Statistical Thermodynamics

Shohoji

2016

Mater. Trans.

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Equilibrium isothermal pressure-composition relationships reported for H solubility in body centered cubic (bcc) V 1¹y M y H x (M = Cr, Mo, Fe or Co) by Suzuki et al. recently on this journal were analyzed with statistical thermodynamics under a priori assumption of constant H-H interatomic interaction energy E(H-H) within homogeneity composition range of bcc V 1¹y M y H x phase at arbitrary temperature T. Results of the present statistical thermodynamic analysis showed that detected H solubility suppression for the examined V 1¹y M y H x was consistently interpreted in terms of decrease of available number ª for occupation by H atoms per metal atom in the V 1¹y M y lattice from ª = 0.55 determined for bcc VH x in the earlier work of the author. The extent Q of stabilization of H atoms in the V 1¹y M y lattice through formation of H-V and H-M bonds was one of principal parameters determined by the statistical thermodynamic analysis. It was intriguing to note that Q(V 1¹y M y H x ) with M = Fe and Co became less negative than Q(VH x ) in pure bcc VH x implying that the extent of stabilization of H atoms in V 1¹y M y lattice with M = Fe or Co increased with reference to that in pure VH x in spite of decreased ª from that (0.55) in VH x . On the other hand, Q(V 1¹y M y H x ) with M = Cr and Mo became less negative (that is decreased stability of H) than Q(VH x ) corresponding straightforwardly to the detected decrease of ª value from that in VH x . Noting the promoted H permeability reported for V 1¹y Fe y membrane by Suzuki et al., search for alloying element M that induced H solubility drop form that in the bcc V but with effect of enhancing stability of H in the V 1¹y M y lattice was concluded to be a pragmatic guideline for the screening of alloying constituent towards development of V-based H permeation membrane material.

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Statistical Thermodynamic Analysis for Isothermal Hydrogenation Performances of Mg<SUB>2-</SUB><SUB>y</SUB>Pr<SUB>y</SUB>Ni<SUB>4</SUB>Intermetallics (<i>y</i> = 0.6, 0.8, 1.0)

Cited by 2 publications

References 21 publications

Characterizing Atomic Interactions in Interstitial Non-Stoichiometric Compounds by Statistical Thermodynamics: Engineering Usage of Estimated Values of Statistical Thermodynamic Parameters

Characterizing Atomic Interactions in Interstitial Non-Stoichiometric Compounds by Statistical Thermodynamics: Engineering Usage of Estimated Values of Statistical Thermodynamic Parameters

Suppressed Hydrogen (H) Solubility in Body Centered Cubic Vanadium (V) by Alloying with Molybdenum (Mo), Chromium (Cr), Iron (Fe) or Cobalt (Co) Appreciated in Terms of Statistical Thermodynamics

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