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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, Liudas;Milčius, Darius;Pranevičius, Liudvikas;Nomgaudytė, Jurgita;Širvinskaitė, Vaiva;Riviere, J.-P;Templier, Claude
Title: Mass-transport driven by surface instabilities in metals under reactive plasma/ion beam treatment at moderate temperature
Is part of: Central European journal of physics. Central Europe : Versita, Springer, 2004, Vol. 2, iss. 1
Extent: p. 67-89
Date: 2004
Keywords: Oxidation;Hydrogenation;Nitriding;Mechanisms;Surface relocations;Mixing;Restructuring
Abstract: This paper presents a generalized approach to the mechanisms of oxidation, hydrogenation and nitriding of metals under ion irradiation with reactive particles at elevated temperatures. Experimental results on the plasma oxidation of bilayered Y/Zr films, the plasma hydrogenation of Mg films and the ion beam (1.2 keV N-2(+)) nitriding of stainless steel are presented and discussed. We make special emphasis on the analysis of surface effects and their role in the initiation of mixing of bilayered films, the ingress of reactive species in the bulk and the restructuring of the surface layers. It is suggested that primary processes driving reactive atoms from the surface into the bulk are surface instabilities induced by thermal and ballistic surface atom relocations under reactive adsorption and ion irradiation, respectively. The diffusion of adatoms and vacancies, at temperature when they become mobile, provide the means to relax the surface energy. It is recognized that the!tabilizing effect of surface adatom diffusion is significant at temperatures below 300-350degreesC. As the temperature increases, the role of surface adatom diffusion decreases and processes in the bulk become dominant. The atoms of subsurface monolayers occupy energetically favorable sites on the surface, and result in reduced surface energy
Affiliation(s): Lietuvos energetikos institutas,
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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