× Updated! Potentials that share interactions are now listed as related models.


Citation: J. Byggmästar, and F. Granberg (2020), "Dynamical stability of radiation-induced C15 clusters in iron", Journal of Nuclear Materials, 528, 151893. DOI: 10.1016/j.jnucmat.2019.151893.
Abstract: Density functional theory predicts clusters in the form of the C15 Laves phase to be the most stable cluster of self-interstitials in iron at small sizes. The C15 clusters can form as a result of irradiation, but their prevalence and survival in harsh irradiation conditions have not been thoroughly studied. Using a new bond-order potential optimised for molecular dynamics simulations of radiation damage, we explore the dynamical stability of the C15 clusters in iron under irradiation conditions. We find that small C15 clusters make up 5–20% of the interstitial clusters formed directly in cascades. In continuous irradiation, C15 clusters are frequently formed, after which they remain highly stable and grow by absorbing nearby single interstitial atoms. Growth of C15 clusters ultimately leads to collapse into dislocation loops, most frequently into 1/2 <111> loops and only rarely collapsing into <100> loops at low temperatures. The population, size, and collapse of C15 clusters during continuous irradiation correlates well with their formation energies relative to dislocation loops calculated at zero Kelvin.

Notes: Jesper Byggmästar notes that "This potential was developed mainly for defect clusters and radiation damage. See also the supplementary pdf of the above paper (open access) for benchmark results."

LAMMPS pair_style tersoff/zbl (2020--Byggmastar-J--Fe--LAMMPS--ipr1)
See Computed Properties
Notes: This file was provided by Jesper Byggmästar (University of Helsinki) on 11 Dec 2019.
Date Created: October 5, 2010 | Last updated: June 09, 2022