Mechanical performance of amorphous diamond-like carbon nanowires
Year: 2024
Type: article
Abstract: Amorphous carbon nanowires (NW) are a fundamental piece in the study of novel nanoarchitectures with unexpected mechanical properties. However, the failure mechanism of amorphous carbon NW is still missing. In this study, classical molecular dynamics was employed to conduct stress-strain tests to address the mechanical response of amorphous carbons NW with different radii. This research characterizes the mechanical properties of aC NW with different sp 3 contents, including Youngs modulus and ultimate tensile stress . Our study reveals that plastic deformation is mediated by chemical modifications in carbon bonding, leading to transitions from sp 2 to sp 3 and vice versa. We observed that denser amorphous carbon materials undergo a transition from sp 3 to sp 2 bonding prior to failure, facilitated by the recombination of sp 2 clusters. Additionally, plastic deformation in amorphous carbon NW is facilitated by the formation of shear transformation zones and nanovoids, with the deformation mechanism strongly dependent on the average coordination of carbon atoms. These insights provide valuable information for designing nanomaterials with tailored mechanical properties .
Source: Diamond and Related Materials
Authors: Fiorella R. Roco, J. Clark, S. Allende, W. Soto, N. Amigo, J. Figueroa, Eduardo M. Bringa, Felipe J. Valencia
Institutions: Catholic University of the Maule, Pontificia Universidad Católica de Chile, Universidad de Santiago de Chile, Center for the Development of Nanoscience and Nanotechnology, Metropolitan University of Technology, University of Mendoza, Consejo Nacional de Investigaciones Científicas y Técnicas
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,610
OpenAlex ID: W4402168422