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Hydrogen Mobility at High Concentrations

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Metal Hydrides

Part of the book series: NATO Advanced Study Institutes Series ((NSSB,volume 76))

Abstract

The roles of crystal structure, hydrogen site occupancy, phase transition, and isotope substitution on the hydrogen diffusion behavior will be considered. After brief discussions of general diffusion concepts and the experimental methods that have been most often used to determine the hydrogen mobility in the high concentration metal hydride phases, the nuclear magnetic resonance techniques that have been extensively applied in hydride diffusion studies will be reviewed in some detail. The emphasis will be on relating measured nuclear relaxation times with diffusion parameters as well as NMR techniques to directly measure the hydrogen diffusion constants. The diversity of diffusion behavior will be illustrated with several specific metal hydride systems including: PDHx, γ-TiHx and structurally related TiCuH, and VHx. Plausible models of the microscopic diffusion mechanisms will also be presented and compared with the observed diffusion behavior in these systems.

Operated by Monsanto Research Corp. for the U.S. Department of Energy under Contract No. DE-AC04-76-DP000.53.

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Bowman, R.C. (1981). Hydrogen Mobility at High Concentrations. In: Bambakidis, G. (eds) Metal Hydrides. NATO Advanced Study Institutes Series, vol 76. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-5814-6_6

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  • DOI: https://doi.org/10.1007/978-1-4757-5814-6_6

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4757-5816-0

  • Online ISBN: 978-1-4757-5814-6

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