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氦、氘对纯铁辐照缺陷的影响 被引量:6

Effects of helium and deuterium on irradiation damage in pure iron
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摘要 在核聚变堆的辐照环境中,核嬗变产物氢、氦对结构材料的抗辐照性能将产生很大的影响.本实验采用离子注入和电子辐照模拟研究了氦和氘对具有体心立方结构的纯铁的影响.采用离子加速器在室温分别对纯铁注入氦离子和氘离子,经500℃时效1h后在高压电镜下进行电子辐照.结果表明:室温注氦和室温注氘的纯铁在500℃时效后分别形成间隙型位错环和空位型位错环.在电子辐照下,间隙型位错环吸收间隙原子而不断长大,而空位型位错环吸收间隙原子不断缩小.通过计算位错环的变化速率发现,空位型位错环比间隙型位错环吸收了更多的间隙原子,即室温注氘纯铁的位错偏压比室温注氦纯铁的偏压参量大,这意味着相同实验条件下空位型位错环对辐照肿胀的贡献大于间隙型位错环对辐照肿胀的贡献.利用氦-空位复合体和氘-空位复合体的结构,分析了注氦和注氘后在纯铁中形成不同类型位错环的原因. Productions of transmute elements (hydrogen and helium) have great influences on the resistance to irradiation damage in structural materials for fusion reactor. The evolution of irradiation damage in bcc iron is investigated with ion implantation and electron irradiation. Pure iron implanted by He+ or D+ ions at room temperature are aged at 500℃ for 1 h, then irradiated by electrons under high voltage electron microscope. The results show that interstitial loops (/-loop) and vacancy loops (v-loop) are formed in He+-implanted iron and D+-implanted iron respectively. Under electron irradiation, due to the absorption of interstitials atom,i-loop grows up while v-loop shrinks. According to the rate of variation of dislocation loop, v-loop absorbs more interstitial atoms, i.e., the dislocation bias of D+-implanted iron is larger than that of He+-implanted iron, which means that the v-loop has the more contribu- tions to irradiation swelling than i-loop. The causes of the different natures of dislocation loops formed in D+-implanted iron and He+-implanted iron are analyzed by the structures of He-V and D-V complexes.
出处 《物理学报》 SCIE EI CAS CSCD 北大核心 2013年第16期305-311,共7页 Acta Physica Sinica
基金 国家重点基础研究发展计划(批准号:2011GB108002) 国家自然科学基金(批准号:50971030,11275023,51071021) 日本学术振兴会Asia-Core计划资助的课题~~
关键词 辐照损伤 位错环 helium, deuterium, irradiation damage, dislocation loop
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  • 1王晓平,谢峰,石勤伟,赵特秀.晶格失配对异质外延超薄膜生长中成核特性的影响[J].物理学报,2004,53(8):2699-2704. 被引量:9
  • 2唐军,杨先清,仇康.反应限制聚集模型的动力学行为的研究[J].物理学报,2005,54(7):3307-3311. 被引量:5
  • 3von den Driesch H J, Jung P 1980 High Temperature-High Pressures 12 635.
  • 4Thomas G J 1983 Radiation Effects 78 37.
  • 5Kaletta D 1983 Radiation Effects 78 245.
  • 6Schroeder H 1983 Radiation Effects 78 297.
  • 7Barnes RS, Mazey D J 1963 Proc. R. Soc. Lond. A 275 47.
  • 8van Siclen C D W, Wright R N 1992 Phys. Rev. Lett. 68 3892.
  • 9Rajaraman R, Viswanathan B, Valsukumar M C, Gopinathan K P1994 Phys. Rev. B 50 597.
  • 10Barnes R S, Nelson R S 1965 Proc. Conf. Radiation Effects (NewYork: Gordon and Breach) p225.

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