Molecular dynamics analysis of friction damage on nano-twin 6 H-SiC surface

In order to investigate the deformation and damage of nano-twin 6 H-SiC after friction, a three-dimensional model was established. It is found that the barrier formed by layered faults can block the propagation of stress and hinder the formation and expansion of dislocation. The strength of the twins shows Hall-Petch phe-nomenon, and the strength is the highest when the thickness is 10.3 nm. The twin boundary is the initial point of deformation damage, and the greater the thickness of the twin, the greater the damage. The Point-Line-Plane destruction in twin crystals has a great influence on the processing of crystal materials.

Automated summary

A three-dimensional model was established to study the deformation and damage of nano-twin 6H-SiC after friction. It was found that the barrier formed by layered faults can obstruct stress propagation and hinder the formation and expansion of dislocations. The strength of the twins exhibits Hall-Petch phenomenon, with the highest strength observed at a thickness of 10.3 nm. The twin boundary serves as the initiation point for deformation damage, and the damage increases with the thickness of the twin.