%0 Journal Article %T Inversion of dislocation loop nature driven by cluster migration in self-ion irradiated nickel %+ Service de recherches de métallurgie physique (SRMP) %+ Institut de Recherche de Chimie Paris (IRCP) %+ Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab) %+ Centre Science des Matériaux et des Structures (SMS-ENSMSE) %+ Lab JANNUS %A Ma, Kan %A Décamps, Brigitte %A Fraczkiewicz, Anna %A Prima, Frédéric %A Loyer-Prost, Marie %< avec comité de lecture %@ 1359-6462 %J Scripta Materialia %I Elsevier %V 208 %P 114338 %8 2021 %D 2021 %R 10.1016/j.scriptamat.2021.114338 %K Nickel %K microstructure %K dislocation %K TEM %K radiation damage %Z Chemical Sciences/Material chemistryJournal articles %X Nickel is widely used as fcc model material to obtain insight into fundamental mechanisms of radiation damage. This work presents irradiation of high-purity nickel using self-ions at 450°C and fine analysis of dislocation loops in specimens prepared by Focus Ion Beam using Transmission Electron Microscopy. For the first time to our knowledge, a drastic change of both loop nature (vacancy-type in irradiated zones v.s. interstitial-type in unirradiated zones) and loop Burgers vector (1/3<111> and 1/2<110> loops v.s. only 1/2<110> loops) is identified along the implantation direction in irradiated nickel. This change may be attributed to the formation of interstitial <110> crowdions and their long-range 1D migration. A defect-free layer related to the annihilation of vacancy defects by injected atoms is detected. It provides an easy way to identify the injection peak in self-ion irradiated specimens and solid validation for damage calculations. %G English %2 https://cea.hal.science/cea-03482273/document %2 https://cea.hal.science/cea-03482273/file/VF_Scripta%20Mat_Revision_cleaned%20version-vf.pdf %L cea-03482273 %U https://cea.hal.science/cea-03482273 %~ IN2P3 %~ CEA %~ INSTITUT-TELECOM %~ ENSCP %~ CNRS %~ ENSC-PARIS %~ PARISTECH %~ DEN %~ INC-CNRS %~ CEA-UPSAY %~ PSL %~ UNIV-PARIS-SACLAY %~ CEA-DRF %~ DEN-SACLAY %~ INSTITUTS-TELECOM %~ IJCLAB %~ TEST-HALCNRS %~ ENSCP-PSL %~ UNIVERSITE-PARIS-SACLAY %~ ANR %~ GS-ENGINEERING %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE %~ TEST2-HALCNRS %~ MAP-CEA