Formation of nanostructures in metals by low-energy ion irradiation

The purpose of this paper is the study of nanostructure formation in metals by low-energy ion irradiation and computer simulation of nonlinear effects in crystal lattices on an atomic scale. Polycrystalline armco-iron and instrumental steel samples were irradiated by low-energy ions of residual gas...

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Bibliographic Details
Published in:	Surface & coatings technology Vol. 201; no. 19; pp. 8552 - 8556
Main Authors:	Tereshko, I.V., Abidzina, V.V., Elkin, I.E., Tereshko, A.M., Glushchenko, V.V., Stoye, Semfira
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Lausanne Elsevier B.V 05-08-2007 Elsevier
Subjects:	Computer simulation Cross-disciplinary physics: materials science; rheology Exact sciences and technology Materials science Nanostructures Nonlinear effects Physics Self-organizing processes Surface treatments Nanostructures Computer simulation Self-organizing processes Nonlinear effects Ion irradiation Ion beam Surface treatments Computerized simulation
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Summary:	The purpose of this paper is the study of nanostructure formation in metals by low-energy ion irradiation and computer simulation of nonlinear effects in crystal lattices on an atomic scale. Polycrystalline armco-iron and instrumental steel samples were irradiated by low-energy ions of residual gas in discharge plasma. The fine structure of the samples was studied by transmission electron microscopy. Computer simulations of the self-organizing processes induced by interaction of the low-energy ions with the crystal lattice surface were performed by means of a molecular dynamics method. We show that the process of low-energy irradiation results in the formation of complex multilayer structures in the near-surface region. There are layers with amorphous, microcrystalline and nanocrystalline structures. The formation of atomic clusters with nanometrical dimensions, running autosolitons, long-lived undamped oscillations in local areas were observed. Such modifications in materials can be understood by the concept of active self-organizing processes in crystal lattices, where the energy transition from a vibrational mode to a translational mode takes place. Low-energy ion irradiation results in a change in the physical and mechanical properties of the irradiated materials.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0257-8972 1879-3347
DOI:	10.1016/j.surfcoat.2006.03.056