New approach to evaluation of the stress-strain properties of nanolayers of solid materials |
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| Authors: | A L Volynskii D A Panchuk S V Moiseeva A S Kechek’yan A I Dement’ev L M Yarysheva N F Bakeev |
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| Institution: | 1.Department of Chemistry,M. V. Lomonosov Moscow State University,Moscow,Russian Federation;2.Department of Chemistry,Moscow Pedagogical University,Moscow,Russian Federation;3.N. S. Enikolopov Institute of Synthetic Polymer Materials,Russian Academy of Sciences,Moscow,Russian Federation |
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| Abstract: | The review focuses on results obtained in the development of a new approach to determination of the stress-strain properties
(tensile strength, yield point, plastic deformation under uniaxial stretching) of nanolayers of solid materials. The approach
is based on analysis of parameters of the microrelief generated by strains in polymer films with hard thin coatings. A significant
increase in the tensile strength and ductility of noble metal coatings under uniaxial stretching at the metal layer thickness
less than 30 nm is demonstrated for the first time. This substantiates the assumption of a specific state of nanolayers of
solid materials. The developed method also enables evaluation of the effect of characteristic defects in solids on their stress-strain
behavior. It was found that the stress-strain properties of nanocoatings depend on the physical state of the polymer substrate.
A possible mechanism of the revealed phenomena is suggested. |
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