Characterization of Defects in Titanium Created by Hydrogen Charging

0508732 - ÚFP 2020 RIV PL eng J - Článek v odborném periodiku
Hruška, P. - Čízek, J. - Knapp, J. - Melikhova, O. - Havela, L. - Mašková, S. - Lukáč, František
Characterization of Defects in Titanium Created by Hydrogen Charging.
Acta Physica Polonica A. Roč. 132, č. 5 (2017), s. 1606-1610. ISSN 0587-4246. E-ISSN 1898-794X
Institucionální podpora: RVO:61389021
Klíčová slova: vacancy formation energies * spectroscopy * positrons * hydride
Obor OECD: Materials engineering
Impakt faktor: 0.857, rok: 2017
Způsob publikování: Open access
http://przyrbwn.icm.edu.pl/APP/PDF/132/app132z5p38.pdf

Hydrogen interaction with vacancies in alpha-Ti was investigated employing positron lifetime spectroscopy combined with ab initio theoretical modeling of vacancy-hydrogen complexes. Ab initio modeling revealed that multiple hydrogen atoms up to 7 can be trapped at vacancies in the alpha-Ti lattice. Trapped H atoms are located close to the nearest neighbor tetrahedral sites around the centre of vacancy. Lifetimes of positrons trapped at vacancies associated with various numbers of hydrogen atoms were calculated. Positron lifetime measurement of H-loaded alpha-Ti samples revealed that phase transition into the hydride phase introduced dislocations. Vacancies were created by H loading as well and agglomerated into small vacancy clusters.
Trvalý link: http://hdl.handle.net/11104/0299562