T-P phase diagram of the FeH system at temperatures to 450°C and pressures to 6.7 GPa

Antonov, V.E.; Belash, I. T.; Ponyatovsky, E.G.

doi:10.1016/0036-9748(82)90387-8

Cited by 75 publications

(36 citation statements)

References 4 publications

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“…The scarce available experimental data on the solubility branches 68,81 are correctly reproduced. Besides, the predicted Curie temperature variation with hydrogen composition was found in agreement with the experimental values of Antonov et al 81 32 Page 32 of 46…”

Section: Calphad Resultssupporting

confidence: 89%

Thermodynamic Modeling of the Ni–H System

et al. 2015

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A new thermodynamic assessment of the Ni-H system has been carried out, providing a complete description valid up to 6×10 9 Pa of this system at the center of hydrogen storage issues. The study includes the hydride formation reaction and the presence of a miscibility gap in the fcc interstitial solid solution of hydrogen in nickel. In addition to a complete literature review, first principles calculations were carried out and combined with other modeling approaches. The Cluster Expansion Method allowed to describe the energetic interactions between atoms leading to the miscibility gap in the fcc solid solution. Besides, the compressibility at high pressure was characterized for each phase including the condensed phases. For this purpose, a specific high pressure model was assessed with the contribution of quasi-harmonic phonon calculations. The obtained consistent model allows to characterize entirely the thermochemical behavior of the Ni-H system.

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Section: Calphad Resultssupporting

confidence: 89%

Thermodynamic Modeling of the Ni–H System

et al. 2015

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“…However, it has been discovered recently that the solubility is enhanced substantially under high hydrogen pressure. Antonov et al (1980Antonov et al ( , 1982 found that the concentration x reaches 0.8 at 6.7 GPa and 250°C, and our independent experiments have shown that x N 0.13 at 3 GPa and 700° C (Fukai et al, 1982). This enhancement of the solubility has been shown to result from the enhancement of the chemical potential of fluid H2 at high pressures .…”

Section: Experimental Approachmentioning

confidence: 74%

Hydrogen in the earth's core. Experimental approach.

Fukai

Akimoto

1983

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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“…1) was constructed by Fukai et al [5] over wide ranges of temperature and hydrogen pressure, including the data reported earlier by other authors [6][7][8]. The main features of the diagram are a rapid descent of the melting point with increasing hydrogen pressure to 3 GPa and the appearance of dhcp (ε) hydride at higher pressures.…”

Section: Introductionmentioning

confidence: 98%