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Hydrogen implantation effect in copper alloys selected for ITER investigated by positron annihilation spectroscopy

机译：正电子ni没光谱法研究用于ITER的铜合金中的氢注入效应

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摘要

Defects in the form of vacancies (loops, voids, etc) created by hydrogen implantation into selected Cu alloys foreseen for the International Thermonuclear Experimental Reactor (ITER) first wall cladding were studied using positron annihilation spectroscopy. The pulsed low-energy positron system, which enables depth profiling of the positron lifetime spectra in the near-surface region (20-460 nm) of hydrogen-implanted copper alloys, was applied, and its results were compared with TRIM calculations and transmission electron microscopy studies. The selected specimens were implanted in the Ion Beam Laboratory of FEI STU Bratislava. The energy of implantation was E_H = 2 * 95 keV for the molecular H_2~+ ion beam. The temperature during this process was lower than 90 ℃. Two implantation doses were chosen for both the alloys: 1.3 * 10~(19) ions cm~(-2) (1.1 C cm~(-2)) and 5 *10~(18) ions cm~(-2) (0.4 C cm~(-2)). Although the influences of neutrons with energy 14 MeV and protons with energy 95 keV are not the same (differences in energy and existence of proton charge), experimental simulation of radiation damage of ITER construction materials was successfully performed. The results are discussed in terms of microstructural changes of the studied materials upon irradiation. The CuAl25 alloy seems to be more resistant to proton bombardment than CuCrZr.
机译：使用正电子an没光谱技术研究了通过氢注入到国际热核实验堆（ITER）第一壁熔覆所预见的所选Cu合金中而形成的空位（环，空隙等）缺陷。应用了脉冲低能正电子系统，该系统能够对氢注入铜合金的近表面区域（20-460 nm）中的正电子寿命谱进行深度分析，并将其结果与TRIM计算和透射电子进行了比较显微镜研究。选定的标本被植入FEI STU布拉迪斯拉发的离子束实验室。分子H_2〜+离子束的注入能量为E_H = 2 * 95 keV。在此过程中温度低于90℃。两种合金都选择了两种注入剂量：1.3 * 10〜（19）离子cm〜（-2）（1.1 C cm〜（-2））和5 * 10〜（18）离子cm〜（-2）（ 0.4 C cm〜（-2））。尽管能量为14 MeV的中子和能量为95 keV的质子的影响是不同的（能量差异和质子电荷的存在），但还是成功地进行了ITER建筑材料辐射损伤的实验模拟。根据所研究材料在辐照下的微观结构变化来讨论结果。 CuAl25合金似乎比CuCrZr更能抵抗质子轰击。

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  • 来源
    《Nuclear fusion》 |2004年第1期|p. 93-97|共5页
  • 作者

    V. Slugen; J. Kuriplach; P. Ballo; P. Domonkos;

  • 作者单位

    Department of Nuclear Physics and Technology, Slovak University of Technology, Bratislava, Slovak Republic;

    Department of Low Temperature Physics, Charles University, Prague, Czech Republic;

    Department of Physics, Slovak University of Technology, Bratislava, Slovak Republic;

    Department of Nuclear Physics and Technology, Slovak University of Technology, Bratislava, Slovak Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
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