The defect recovery of a nickel electrodeposit was studied in the 45-240 degrees C temperature range by positron lifetime spectroscopy. The initial recovery resulted in a large increase in the trapping rates of various lattice defects and was associated with the release of trapped hydrogen from vacancies. The observed lifetime changes were analysed in terms of a four-state positron trapping model. Employing a simple model of hydrogen thermal detrapping from vacancies the authors found EB=0.44+or-0.04 eV for the hydrogen-vacancy binding energy in nickel.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Metals and Alloys