Structural investigation of hydrogen solubility in YyR1-y alloys (R=Tb and Gd)

Y. Nakamura, P. Vajda, O. J. Zogal, Etsuo Akiba

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

We have studied the structure of hydrogen loaded YyTb1-y alloys, with y=0.2 and 0.9, by X-ray diffraction (XRD) techniques. The room-temperature XRD profiles of Y0.2Tb0.8Hx exhibit, in addition to the peaks of the h.c.p. metal lattice, those of the f.c.c. dihydride for all x>0. In the case of Y0.9Tb0.1Hx, the f.c.c. peaks show up only for x=0.20, indicating H-solubility for smaller hydrogen concentrations in this alloy. As for the two YyGd1-y (y=0.3 and 0.4) alloys, we observe in both cases precipitation of the dihydride for the smallest H concentrations. These results complement earlier resistivity measurements on the same systems, by presenting the evolution of the respective lattice parameters and their c/a ratios upon hydrogen addition and, in particular, specifying the influence of the metal lattice environment upon the state of the precipitating hydride.

Original languageEnglish
Pages (from-to)105-108
Number of pages4
JournalJournal of Alloys and Compounds
Volume356-357
DOIs
Publication statusPublished - Aug 11 2003
EventProceedings of the Eight International Symposium on Metal Hyd (MH 2002) - Annecy, France
Duration: Sep 2 2002Sep 6 2002

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Hydrogen
Solubility
Metals
X ray diffraction
Hydrides
Lattice constants
Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Structural investigation of hydrogen solubility in YyR1-y alloys (R=Tb and Gd). / Nakamura, Y.; Vajda, P.; Zogal, O. J.; Akiba, Etsuo.

In: Journal of Alloys and Compounds, Vol. 356-357, 11.08.2003, p. 105-108.

Research output: Contribution to journalConference article

Nakamura, Y. ; Vajda, P. ; Zogal, O. J. ; Akiba, Etsuo. / Structural investigation of hydrogen solubility in YyR1-y alloys (R=Tb and Gd). In: Journal of Alloys and Compounds. 2003 ; Vol. 356-357. pp. 105-108.
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AU - Akiba, Etsuo

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N2 - We have studied the structure of hydrogen loaded YyTb1-y alloys, with y=0.2 and 0.9, by X-ray diffraction (XRD) techniques. The room-temperature XRD profiles of Y0.2Tb0.8Hx exhibit, in addition to the peaks of the h.c.p. metal lattice, those of the f.c.c. dihydride for all x>0. In the case of Y0.9Tb0.1Hx, the f.c.c. peaks show up only for x=0.20, indicating H-solubility for smaller hydrogen concentrations in this alloy. As for the two YyGd1-y (y=0.3 and 0.4) alloys, we observe in both cases precipitation of the dihydride for the smallest H concentrations. These results complement earlier resistivity measurements on the same systems, by presenting the evolution of the respective lattice parameters and their c/a ratios upon hydrogen addition and, in particular, specifying the influence of the metal lattice environment upon the state of the precipitating hydride.

AB - We have studied the structure of hydrogen loaded YyTb1-y alloys, with y=0.2 and 0.9, by X-ray diffraction (XRD) techniques. The room-temperature XRD profiles of Y0.2Tb0.8Hx exhibit, in addition to the peaks of the h.c.p. metal lattice, those of the f.c.c. dihydride for all x>0. In the case of Y0.9Tb0.1Hx, the f.c.c. peaks show up only for x=0.20, indicating H-solubility for smaller hydrogen concentrations in this alloy. As for the two YyGd1-y (y=0.3 and 0.4) alloys, we observe in both cases precipitation of the dihydride for the smallest H concentrations. These results complement earlier resistivity measurements on the same systems, by presenting the evolution of the respective lattice parameters and their c/a ratios upon hydrogen addition and, in particular, specifying the influence of the metal lattice environment upon the state of the precipitating hydride.

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