Evolution of vacancy defects and dislocations in surface layers of iron as a result of pulsed electron beam treatment |
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| Institution: | 1. Sumy Institute for Surface Modification, P.O.Box 163, Av. T. Schevchenko 17, 244030 Sumy, Ukraine;2. Sumy State University, 244 Sumy, Ukraine;3. Technical University, Ust-Kamenogorsk, Kazakhstan;4. Academy of Bank Affairs, 244030 Sumy, Ukraine;5. Dipartimento di Fisica, Università di Trento, 38100 Povo, Trento, Italy;6. Oxford University, SPM Faculty, OX1 3NP, Oxford, UK;1. Key Laboratory of Nuclear Physics and Ion-beam Application (MOH), Institute of Modern Physics, Fudan University, Shanghai 200433, China;2. The First Sub-Institute, Nuclear Power Institute of China, Chengdu 610005, China;1. Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India;2. Department of Chemical Engineering (Integrated Engineering), & Center for the SMART Energy Platform, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin, Gyeonggi 17104, South Korea;3. Electrochemical Energy Storage and Conversion Laboratory (EESCL), Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;2. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;3. Central Iron & Steel Research Institute, Beijing 100081, China;1. Lanzhou City University, 730000, China;2. Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics, Lanzhou, 730000, China;3. National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Lanzhou Institute of Physics, Lanzhou, 730000, China;1. Department of Chemistry, School of Sciences, Zhejiang Sci-Tech University, Hangzhou, 310018, PR China;2. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China;3. School of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu, 241000, PR China |
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| Abstract: | Using a micro-beam of ions (PIXE, RBS), a slow positron beam, measurements of positron lifetime, TEM and SEM techniques, formation of vacancy defects and dislocations has been found in a near-surface iron layer as a result of pulsed electron beam treatment. It has been shown that as a result of the HCEB treatment regions of a low local electron density are formed, which seem to be “embryos” for craters. In spite of the crater formation and high dislocation density (exceeding 1010 cm?2) in a near-surface layer, we found a decrease in wear resistance to dry friction and an increase in microhardness. |
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