SKM 2023 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 22: Mechanical Properties and Alloy Design: Porous and Nanostructured Materials

MM 22.1: Vortrag

Dienstag, 28. März 2023, 14:15–14:30, SCH A 118

tailoring mechanical properties of lightweight 1D Nanostructures — Samuel Baltazar^1,2, Javier Rojas^1,2, •Felipe Valencia^2,3, Sebastian Allende^1,2, Rafael Gonzalez^2,4, Eduardo Bringa⁵, and Pierre Cocco-Magnard² — ¹Physics Department, Universidad de Santiago de Chile, Chile — ²Center for the development of Nanoscience and Nanotechnology, Universidad de Santiago de Chile, Chile — ³Engineering Faculty, Universidad Catolica del Maule, Chile — ⁴Centro de Nanotecnología Aplicada, Universidad Mayor, Chile — ⁵CONICET & Facultad de Ingeniería, Universidad de Mendoza, Argentina

1D Nanostructures such as nanowires (NW) and nanotubes (NT) have gained a lot of attention due to their mechanical and electronic properties. The deformation of NT and NW has been previously studied, finding different fracture mechanisms. Tension and compression deformations show elastic regimes until a sudden stress drop due to the fast generation of dislocations. Synthesis of polycrystalline NW allows the reinforcement of the material's response. We report the mechanical properties are studied for mono and bimetallic systems by means of molecular dynamics simulations. Interatomic potentials were used to model Ni, Fe, and bimetallic NTs and NWs with dimensions similar to the experimental setup. Ni NT shows an asymmetry in the stress response under tension and compression, mediated by twins and stacking-faults dislocations, with no significant degradation of mechanical properties up to 60% mass reduction than NW, opening the generation of new lightweight and resistant materials.