Observation and analysis of defect structure evolution from radiation damage by D-T fusion neutrons |
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| Affiliation: | 1. SCK•CEN, Nuclear Materials Science Institute, Boeretang 200, B-2400 Mol, Belgium;2. Department of Experimental Nuclear Physics K-89, Institute of Physics, Nanotechnologies, and Telecommunications, Peter the Great St. Petersburg Polytechnic University, 195251 St.Petersburg, Russia;3. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany;1. Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan;2. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan;1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China;2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;1. Department of Physics, Utkal University, Bhubaneswar 751004, India;2. National Institute of Science Education and Research, Bhubaneswar 751 005, India;3. Institutes of Physics, Bhubaneswar 751005, India;4. Inter-University Accelerator Centre, New Delhi 110 067, India;1. Department of Nuclear Engineering, Texas A&M University, TX 77843, United States;2. Department of Material Science and Engineering, Texas A&M University, TX 77843, United States;3. Radiation Effects Consulting, Richland, WA 99354, United States |
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| Abstract: | A previous report on the defect structure evolution in metals, alloys and other materials by D-T fusion neutron irradiation (J. Nucl. Mater. 133&134 (1985) 85) was not accompanied with figures and illustrations, and they are all presented in this paper. More than half of the figures consists of electron micrographs, including the following: disordered zones to show the flight distances of interstitial atoms, amorphous zones in a semiconductor, grouped defect clusters developed from sub-cascade damage, stereo-micrographs of three dimensional configurations of defect clusters in sub-cascade groups, variation of defect structures with irradiation temperature, comparison of defect structures developed in thin foil and bulk specimens to demonstrate the role of free interstitials, homogeneous and localized formation of interstitial clustered defects, detection of invisible defects by the aid of electron illumination, and dislocation structures introduced by the deformation of irradiated materials. The other figures contain numerical results of micrograph analysis, which can be used for the estimation of neutron collision cross-section and primary knock-on energy. Point defect processes occurring during the damage structure evolution, including the dynamical effect of collisions, are discussed on the basis of experimental observations. |
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