Heat resistance of a Pt crystal reinforced with CNT’s

Abstract

Metal matrix composites are advanced materials capable of exhibiting increased strength, wear and creep resistance, excellent damping and reduced thermal expansion, making them suitable for a wide range of applications in many industries including transportation, consumer transportation, cutting tools, consumer electronics. , defense, space, aerospace, mechanical engineering and metalworking and many others. With the rapid development of nanotechnology, there has been a growing demand for the development of new metal matrix nanocomposites for a variety of fields such as structural engineering and functional device applications. One of the most effective approaches to the creation of composites is the reinforcement of a metal matrix with carbon-based materials - carbon nanotubes (CNTs) and fullerenes. In this work, the processes of heating and cooling of the metal - CNT composite are simulated by the molecular dynamics method. The LAMMPS software and a proven set of interatomic potentials were used for modeling. It has been found that the reinforcement of metallic CNT crystals leads to a change in its melting point. In this case, a decrease in the melting temperature was found, which is associated with an increase in the fraction of free volume, which in turn is determined by the small size of the computational cell. In the future, it is planned to increase the size of the considered computational cell and determine the effect of the cell size and geometry of the strengthening component on the complex of physical and mechanical properties of metal-matrix composites.