Effects of electronic excitation on cascade dynamics in nickel-iron and nickel-palladium systems

SCRIPTA MATERIALIA

卷:138

Article

Zarkadoula, Eva¹  Samolyuk, German¹  Weber, William J.^1,2 

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

关键词: Molecular dynamics;    Two-temperature model;    Electronic effects;    Nickel alloys;    Cascades;   

DOI  :  10.1016/j.scriptamat.2017.05.041

来源: Elsevier

【 摘 要 】

Using molecular dynamics simulations and the two-temperature model, we provide a comparison of the surviving damage from single ion irradiation,events in nickel-based alloys, for cascades with and without taking into account the effects of the electronic excitations. We find that including the electronic effects impacts the amount of the resulting damage and the production of isolated defects. Irradiation of nickel-palladium systems results in larger numbers of defects compared to nickel-iron systems, with similar numbers of isolated defects. We additionally investigate the mass effect on the two-temperature model in molecular dynamics simulations of cascades. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free