| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Helium-Implantation-Induced Damage in NHS Steel Investigated by Slow-Positron Annihilation Spectroscopy |
| LI Yuan-Fei1,2,3, SHEN Tie-Long1, GAO Xing1, GAO Ning1, YAO Cun-Feng1, SUN Jian-Rong1, WEI Kong-Fang1, LI Bing-Sheng1, ZHANG Peng4, CAO Xing-Zhong4, ZHU Ya-Bin1, PANG Li-Long1, CUI Ming-Huan1, CHANG Hai-Long1, WANG Ji1,2,3, ZHU Hui-Ping1,2, WANG Dong1,2, SONG Peng1,2, SHENG Yan-Bin1, ZHANG Hong-Peng1, HU Bi-Tao3, WANG Zhi-Guang1** |
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
2University of Chinese Academy of Sciences, Beijing 100049
3School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000
4Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
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| Cite this article: |
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LI Yuan-Fei, SHEN Tie-Long, GAO Xing et al 2014 Chin. Phys. Lett. 31 036101 |
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Abstract Evolutions of defects and helium contained defects produced by atomic displacement and helium deposition with helium implantation at different temperatures in novel high silicon (NHS) steel are investigated by a slow positron beam. Differences of the defect information among samples implanted by helium to a fluence of 1×1017 ions/cm2 at room temperature, 300°C, 450°C and 750°C are discussed. It is found that the mobility of vacancies and vacancy clusters, a recombination of vacancy-type defects and the formation of the He-V complex lead to the occurrence of these differences. At high temperature irradiations, a change of the diffusion mechanism of He atoms/He bubbles might be one of the reasons for the change of the S-parameter.
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Received: 15 November 2013
Published: 28 February 2014
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