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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Fizika / Physics (N002)
Author(s): Pranevičius, Liudvikas;Milčius, Darius;Pranevičius, Liudas;Templier, Claude;Bobrovaitė, Birutė;Barnackas, Irmantas
Title: The role of grain boundaries in the mechanism of plasma immersion hydrogenation of nanocrystalline magnesium films
Is part of: Applied surface science. Amsterdam : Elsevier Science B.V., 2006, Vol. 252, no. 12
Extent: p. 4202-4208
Date: 2006
Keywords: Mg films;Grain boundaries;Plasma immersion ion implantation;Hydrogen storage
Abstract: In this paper, attention in focused on the nanostructured magnesium films for hydrogen storage. It is shown that 2 mu m thick Mg film is transformed into MgH2 film under high-flux and fluence hydrogen plasma immersion ion implantation at 450 K for 15 min. All hydrogen desorbs at temperature about 530 K, which corresponds to the decomposition of MgH2 -> Mg + H-2 up arrow. The macroscopic and microscopic observations show that magnesium film undergoes a high deformation and restructuring during hydrogenation-dehydrogenation reaction. The suggested hydrogenation model is based upon the incorporation of excess of hydrogen atoms in grain boundaries of nanocrystalline Mg film driven by the increase in surface chemical potential associated with the implantation flux. The results provide new aspects of hydriding of thin nanocrystalline film materials under highly non-equalibrium conditions on the surface
Affiliation(s): Lietuvos energetikos institutas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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