Mechanical and thermal properties of graphene/Ni composites: atomic simulation
Karina A. Krylova, Liliya R. Safina, Ramil T. Murzaev, Julia A. Baimova; Institute for Metals Superplasticity Problems RAS, Ufa, Russia
Abstract
Composite materials based on graphene with metal particles are relevant objects of research, since they have unique properties necessary for future technologies. In works [1, 2], a method is proposed for the preparation of a new generation of composites based on crumpled graphene with the addition of metal nanoparticles. Such materials can combine extraordinary mechanical and thermal properties, and their study is of great practical importance for microelectronics, rocketry and aerospace industry.
In this paper, the strength, nanohardness, and thermal conductivity of a Ni/graphene composite obtained by high-temperature compression are investigated using molecular dynamics simulation. The composite is based on crumpled graphene with nickel nanoparticles placed in its internal voids. The molecular dynamics simulation was performed using the LAMMPS software code. It was found that the volume fraction of nickel atoms has a strong effect on the tensile strength, nanohardness, and thermal conductivity of the graphene/Ni composite. The higher the volume fraction of nickel atoms in the composite, the higher its hardness and thermal conductivity, but the lower the tensile strength. This suggests that the effect of the volume fraction of nickel atoms on the properties of the composite is of a different nature: the strength of the composite is more influenced by the graphene network, and the thermal conductivity is influenced by the presence of a conductive metal.
Work of K.K., L.S. and J.B. is supported by Russian Science Foundation (20-72-10112-Π). Work of R.M. is supported by State Assignement of IMSP RAS (Young Scientist Laboratory).
1. L.R. Safina, J.A. Baimova, K.A. Krylova. Materials Today Physics (2022), V. 28., P. 100851.
2. K.A. Krylova, J.A. Baimova, R.R. Mulyukov. Letters on Materials (2019), V. 9 (1), P. 81-85.
Speaker
Krylova Karina
Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, Russia
Russia
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