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Project CSSDT 15.817.02.06A Nanoindentation deformation for mechanical characterization and creation of new local structures in vitreous, polimeric and crystalline materials

Type : Institutional project, SCSTD code 15.817.02.06A, acronym - NANOINMEC
Head : Olga Shikimaka, Ph.D.
Duration : 2015 - 2019
Division(s) : Laboratory of Mechanical Properties of Materials “Iulia Boiarskaia”

The projectis was aimed to the study by means of the dynamic nanoindentation method of the micro- and nanomechanical properties of advanced materials with a view of their application in optoelectronics, magneto-optics, medicine. These are the bulk (3D) materials and film/substrate strucrures, borophosphate and aluminophosphate glasses doped with rare earth (Dy, Tb), transition (Mn, Fe) and post-transition (Bi, Pb) elements, glassy copolymers of styrene and methyl acid, coated films/substrate structures (IT0 Si02/Si structures, Cu coating on the Si, MgO and LiF substrates). A new and less studied area was elucidated in the basic mechanisms of the deformation of vitreous materials and polymers in micro- and nanovolumes depending on the structure, composition and deformation regimes, which are of interest from both the fundamental point of view, particularly, in terms of the study of deformation peculiarities of amorphous materials, and practical one, because this knowledge will open up new possibilities for creating materials with desired mechanical properties that will contribute to obtain the safe and sustainable systems and devices based on them.

Also in this project the nanoindentation method was be used in a new aspect, for the creation of special local structures in the glassy matrix with modified optical, mechanical, electrical properties at the micro- and nanoscale under high local pressures (about 5-12 GPa) arising during indentation. As well, the effect of the local crystallization of amorphous structure was be used trough the laser processing, which fiind his application as an effective method for producing regular micro/nanostructures (systems of dots, lines, gratings). Different indentation regimes, thermal and laser surface treatment, either in combination or separately, was applied to find the best ways for micro- and nanostructuring of surfaces, which will contribute to the development of new effective nanotechnologies for integrated systems in the field of micro-optoelectronics.

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