Abstract
The proton NMR relaxation times and Knight shifts are reported for the hydrides HfV2H2.1and ZrMnHx, (x = 2.0, 2.45, 3.0, 3.2, 3.4) in the temperature range 160<T<400K using the spinecho method. The results are interpreted in terms of a diffusional relaxation mechanism as well as a magnetic relaxation mechanism for the hydride ZrMn2Hx. The diffusional activation energy and the proton jump frequency were extracted from our measurements on HfV2H2.1.to be 4.3 kcal/mole and 3×1012s-1 respectively. The diffusional activation energies are almost independent of hydrogen concentration, x, in ZrMn2Hx, and equal to 3.7 ±0.6 kcal/mole approximately. Our data is compared to diffusion properties and sorption properties of other intermetallic hydrides.
Original language | English |
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Pages (from-to) | 69-77 |
Number of pages | 9 |
Journal | Zeitschrift fur Physikalische Chemie |
Volume | 117 |
Issue number | 117 |
DOIs | |
State | Published - 1979 |
Keywords
- Activation energies
- HfVH
- Hydride
- Proton NMR relaxation
- ZrMnH