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Abstracts
In the present work positron annihilation spectroscopy was employed for investigation of hydrogen-induced defects in Pd. Well annealed Pd samples were electrochemically charged with hydrogen and development of defects with increasing hydrogen concentration x_{H} was investigated. At low concentrations (α-phase, x_{H} < 0.017 H/Pd) hydrogen loading introduced vacancies, since absorbed hydrogen segregating at vacancies lowers remarkably the vacancy formation energy. When hydrogen concentration exceeds 0.017 H/Pd, particles of palladium hydride (PdH) are formed. Stress induced by growing PdH particles leads to plastic deformation which generates dislocations and vacancies in the sample.
Discipline
- 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
- 61.72.-y: Defects and impurities in crystals; microstructure(for radiation induced defects, see 61.80.-x; for defects in surfaces, interfaces, and thin films, see 68.35.Dv and 68.55.Ln; see also 85.40.Ry Impurity doping, diffusion, and ion implantation technology; for effects of crystal defects and doping on superconducting transition temperature, see 74.62.Dh)
Journal
Year
Volume
Issue
Pages
752-755
Physical description
Dates
published
2014-03
Contributors
author
- Faculty of Mathematics and Physics, Charles University in Prague V Holešovičkách 2, Praha 8, CZ-180 00, Czech Republic
author
- Faculty of Mathematics and Physics, Charles University in Prague V Holešovičkách 2, Praha 8, CZ-180 00, Czech Republic
author
- Faculty of Mathematics and Physics, Charles University in Prague V Holešovičkách 2, Praha 8, CZ-180 00, Czech Republic
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv125n319kz