| Autor: |
Mito, Masaki, Fukuyama, Tomoya, Kitamura, Yuichiro, Deguchi, Hiroyuki, Edalati, Kaveh, Horita, Zenji |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 6/7/2020, Vol. 127 Issue 21, p1-6, 6p, 1 Diagram, 5 Graphs |
| Abstrakt: |
Hydrogen absorption and desorption through diffusive processes and the accompanying phase transformations in hydrogen storage materials have been investigated by x-ray diffraction, thermogravimetry, pressure-composition-temperature isotherms, and electrical resistance measurements. We use time- and temperature-dependent magnetic measurements to gain a detailed understanding of these phenomena in palladium hydride PdH 0.64 prepared by severe plastic deformation via the high-pressure torsion method. The concept of our method is pursuing an increase in the ratio of the paramagnetic α -phase Pd+H to the diamagnetic β -phase PdH. An antiferromagnetic correlation appears between the paramagnetic moments of Pd at a low temperature and a huge discrete change in magnetization appears due to collective H desorption above room temperature. It is also verified that H diffusion and its desorption can be changed with the accumulation of the severe lattice strain. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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