Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 439, Issue 1-3, Pages 185-191Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2013.04.013
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Funding
- Center for Materials at Irradiation and Mechanical Extremes (CMIME), an Energy Frontier Research Center (EFRC) by the DOE, Office of Science, Office of Basic Energy Sciences [2008LANL1026]
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
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Through in situ Cu3+ ion irradiation at room temperature in a transmission electron microscope (TEM), we have investigated the evolution of defect clusters as a function of the radiation dose at different distances from the 3 {112} incoherent twin boundary (ITB) in Cu. Post in situ ion irradiation, high resolution TEM was used to explore the types of defects, which are composed of a high-density of vacancy stacking fault tetrahedra (SFT) and sparsely distributed interstitial Frank loops. During irradiation, defect clusters evolve through four stages: (i) incubation, (ii) non-interaction, (iii) interaction and (iv) saturation; and the corresponding density was observed to initially increase with irradiation dose and then approach saturation. No obvious denuded zone is observed along the 3 {112} ITB and the configuration of defects at the boundary displays as truncated SFTs. Several defect evolution models have been proposed to explain the observed phenomena. Published by Elsevier B.V.
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