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Laboratory for Metallic materials with spatial gradient structure

Invited researcher Elias C. Aifantis
Contract number
14.Z50.31.0039
Time span of the project
2017-2019

As of 30.01.2020

31
Number of staff members
10
scientific publications
5
Objects of intellectual property
General information

Name of the project: 

Synthesis and study of prospective multi-purpose metallic materials with extremely high density of defects

Strategy for Scientific and Technological Development Priority Level: а, б


Goals and objectives

Project objective:

Creating a new class of prospective multi-purpose metallic materials with developed meta-stable defect structures that can be characterized as a spatial-gradient structure providing unique mechanical, chemical and biological properties


The practical value of the study

  • We have studied influence of thermal load and various environments on pentagonal objects. For theoretical description of behavior of such objects in force and temperature fields apart from the disclination approach gradient mechanics was also used.
  • Our team has solved the elastic problem of dilational inclusion in the form of a cut spherical segment in a spherical particle. On this basis, elastic fields and energy of Janus particles have been determined.
  • We have studied evolution of defect structure in pentagonal particles. In addition to the existing models we have proposed a theoretical model describing initial tense condition in dodecahedral small particle as in an elastic sphere with axial partial Wedge disclination and relaxation of this tense state by formation of circular prismatic disclination loops in the equatorial plane of the sphere that is normal to the dislocation line.
  • We have have developed and examined materials in the forms whiskers and nano-tapes. Our researchers have shown potential for usage of such materials in Li-Ion batteries.
Implemented results of research:
Materials with high specific surface area have been developed for new generation Li-Ion batteries

Education and career development:

- The laboratory has conducted the internship «Modeling and quantitative analysis of conditions of crystallization and technologies of growing using the method of electrodeposition of specific nanoobjects» for professionals from research institutions

- The leading scientist has developed the lecture course «Continuum Mechanics and Diffusion»

- One candidate dissertation has been defended

Collaborations:

Institute of Applied Mechanics of the Russian Academy of Sciences (Russia), Institute of Machine Science Research of the Russian Academy of Sciences (Russia), University of Lorraine (France), Aristotle University of Thessaloniki (Greece), Gdańsk University of Technology (Poland), University of Florida (USA): joint research and publications


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Tsagrakis I., Yasnikov I.S., Aifantis E.C.
Gradient Elasticity for Disclinated Micro Crystals. Mechanics Research Communications 93: 159–162 (2018).
Tsagrakis I., Aifantis E.C.
Thermodynamic Coupling between Gradient Elasticity and a Cahn-Hilliard Type of Diffusion: Size-Dependent Spinodal Gaps. Continuum Mechanics and Thermodynamics 29(5): 1181–1194 (2017).
Krauchanka M.Yu., Krasnitckii S.A., Gutkin M.Yu., Kolesnikova A.L., Romanov A.E., Aifantis E.C.
Generation of Circular Prismatic Dislocation Loops in Decahedral Small Particles. Scripta Materialia 146: 77–81 (2018).
Aifantis E.C.
Towards Internal Length Gradient Chemomechanics. Reviews on Advanced Materials Science 48(2): 112–130 (2017).
Lurie S.A., Volkov-Bogorodskiy D.B., Menshykov O., Solyаev Y.О., Aifantis E.С.
Modeling the Effective Mechanical Properties of “Fuzzy Fiber” Composites across Scales Length. Composites Part B Engineering 142: 24–35 (2018).
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