Molecular dynamics simulations of interactions between energetic dust and plasma-facing materials

Niu, Guojian; Li, Xiao-Chun; Xu, Qianfan; Yang, Zhongshi; Luo, Guang–Nan

doi:10.1016/j.fusengdes.2015.05.079

Cited by 3 publications

(1 citation statement)

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“…Regarding W, several papers of interest were published [22][23][24]. In Guo et al, clusters with three different KE are examined, namely, 1, 10 and 100 keV/cluster for low-, highand hyper-energy impacts.…”

Section: Introductionmentioning

confidence: 99%

Analysis of hypervelocity impacts: the tungsten case

Fraile¹,

Dwivedi²,

Bonny³

et al. 2022

Nucl. Fusion

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The atomistic mechanisms of damage initiation during high velocity (v up to 9 km/s, kinetic energies up to 200 keV) impacts of W projectiles on a W surface have been investigated using parallel molecular-dynamics simulations involving large samples (up to 40 million atoms). Various aspects of the impact at high velocities, where the projectile and part of the target materials undergo massive plastic deformation, breakup, melting, and vaporization, are analyzed. Different stages of the penetration process have been identified through a detailed examination of implantation, crater size and volume, sputtered atoms, and dislocations created by the impacts. The crater volume increases linearly with the kinetic energy for a given impactor; and the total dislocation length increases with the kinetic energy but depends itself on the size of the impactor. Furthermore, the total dislocation length is less dependent of the fine details of the interatomic potential. The results are rationalized based on the physical properties of bcc W.

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Section: Introductionmentioning

confidence: 99%