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Analysis of the mechanical properties of a graphene-nickel composite obtained under hydrostatic compression at elevated temperatures

Liliya R. Safina,1, Ramil T. Murzaev,2 Karina A. Krylova,1,2 Julia A. Baimova,2 1 Ufa State Petroleum Technological University, Ufa, Russia 2 Institute for Metals Superplasticity Problems of the Russian Academy of Sciences, Ufa, Russia

Abstract

The mechanical characteristics of metal-graphene composites can be affected by various factors, such as the processing method, the temperature at which the experiment is carried out, the ratio of the number of atoms, etc. Experimental research is still laborious and expensive, so it is more convenient to study metal-graphene composites and predict mechanical properties by simulation. In this work, molecular dynamics is used to study the fabrication of a graphene-nickel composite at elevated temperatures. In order to obtain a composite, annealing is applied to the initially porous structure (crumpled graphene), into the pores of which nickel nanoparticles of different sizes are added. Hydrostatic compression at temperatures from 1000 to 2000 K is applied further. To study mechanical response, the resulting composite materials are subjected to uniaxial tension. It is shown, that in the temperature range from 1000 K to 2000 K composites can be successfully obtained for any number of Ni atoms. However, with an increase in the number of Ni atoms, the strength of the composite decreases.

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Liliya Rishatovna Safina
Ufa State Petroleum Technological University
Russia

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