RT info:eu-repo/semantics/article
T1 Self-healing ability assessment of irradiated multilayered composites: A continuum approach
A1 Ortún Palacios, Jaime
A1 Locci,  Antonio Mario
A1 Delogu, Francesco
A1 Cuesta López, Santiago
K1 Materia-Estructura
K1 Matter-Constitution
K1 Materiales
K1 Materials
AB Atomistic simulations have revealed an unconventional behavior of point defects at interfaces found in multilayer composites synthesized by physical vapor deposition but the observed mechanisms that involve point-defect annihilation are subject to time-scale limitations. So, a mathematical model that describes long-term evolution of point defects in such materials under irradiation is presented in this work. Firstly, the effect of interface point-defect trapping and recombination mechanisms on point-defect concentrations has been studied. In addition, the effect of interface self-interstitial atoms loading, which has been seen during collision cascades, and constitutional vacancies has been studied too. Two interface configurations have been considered between metals in a β-α-β three-layer system (α = Cu and β = Nb, or V), KSmin and KS1. These interfaces correspond to ground-state and defect-free KS structures respectively. The respond to irradiation of the systems investigated here, Cu/Nb and Cu/V, depends on both, interface characteristics and bulk properties. Nonetheless, the influence of the properties of one metal in the point-defect evolution of the other metal is only effective if there are constitutional vacancies at the interface, i.e., for KSmin. Especial attention has been paid to the behavior of the same metal (Cu) when it is surrounded by diverse metals (Nb, or V) with the aim of comparing quantitatively our model predictions with experimental results reported elsewhere. The lower concentration of vacancies in Cu layer of Cu/Nb system at steady state is due to the low mobility of vacancies in niobium.
PB Elsevier
SN 0022-3115
YR 2018
FD 2018-12
LK http://hdl.handle.net/10259/5591
UL http://hdl.handle.net/10259/5591
LA eng
NO European Social Fund, Operational Programme of Castilla y León, and Junta de Castilla y León, through the Ministry of Education, as well as by the European Union Framework Programme 7, Multiscale Modelling and Materials by Design of Interface-Controlled Radiation Damage in Crystalline Materials (RADINTERFACES) under grant agreement no. 263273
DS Repositorio Institucional de la Universidad de Burgos
RD 30-abr-2024