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首页> 外文期刊>Nuclear fusion >Mass flow facilitates tungsten blistering under 60keV helium ion implantation
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Mass flow facilitates tungsten blistering under 60keV helium ion implantation

机译：质量流量促进60keV氦离子注入下的钨起泡

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摘要

Gaseous ion implantation induces displacement damage and gaseous atom uptake in the target material and is widely adopted to simulate plasma-material interaction in fusion devices. Here we report an observation of tungsten blistering with large plastic deformation under 60 keV helium ion implantation at room temperature. The near-surface morphology and microstructure analyses suggest more than 50% plastic elongation and breakdown of lattice periodicity in the blister caps. We propose that collision cascades and high-concentration helium atoms not only greatly modify the tungsten microstructure, but also enhance mass flow in terms of point defect diffusion in blister caps. The mass flow ultimately aggravates the relaxation of stresses in the tungsten surface and facilitates tungsten blistering during high-energy gaseous ion implantation. We sketch out the blistering process and stress the vital importance of dynamic processes in the response of plasma-facing materials subjected to low-energy plasma penetration and high-energy neutron bombardment in fusion devices.
机译：气态离子注入在目标材料中引起位移损伤和气态原子吸收，被广泛用于模拟聚变装置中的等离子体与材料的相互作用。在这里我们报告观察到在室温下60 keV氦离子注入下钨具有大塑性变形的起泡现象。近表面形貌和微观结构分析表明，在泡罩中塑性伸长率超过50％，晶格周期性破坏。我们提出，碰撞级联和高浓度氦原子不仅会极大地改变钨的微观结构，而且还会在泡罩中的点缺陷扩散方面提高质量流量。质量流最终加剧了钨表面应力的松弛，并在高能气态离子注入过程中促进了钨的起泡。我们勾勒出起泡过程，并强调动态过程在面对面向等离子体的材料在聚变设备中受到低能等离子体穿透和高能中子轰击的响应中的至关重要。

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  • 来源
    《Nuclear fusion》 |2017年第7期|1-6|共6页
  • 作者

    Wenjia Han; Jiangang Yu; Zhe Chen; Guanghong Lu; Kaigui Zhu;

  • 作者单位

    Department of Physics, Beihang University, Beijing 100191, People's Republic of China;

    Department of Physics, Beihang University, Beijing 100191, People's Republic of China;

    Department of Physics, Beihang University, Beijing 100191, People's Republic of China;

    Department of Physics, Beihang University, Beijing 100191, People's Republic of China,Beijing Key Laboratory of Advanced Nuclear Energy Materials and Physics, Beihang University, Beijing 100191, People's Republic of China,Key Laboratory of Micro-Nano Measurement-Manipulation and Physics, Ministry of Education, 37 Xueyuan Road, Haidian District, Beijing 100191, People's Republic of China;

    Department of Physics, Beihang University, Beijing 100191, People's Republic of China,Beijing Key Laboratory of Advanced Nuclear Energy Materials and Physics, Beihang University, Beijing 100191, People's Republic of China,Key Laboratory of Micro-Nano Measurement-Manipulation and Physics, Ministry of Education, 37 Xueyuan Road, Haidian District, Beijing 100191, People's Republic of China;

  • 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
  • 关键词

    ion implantation; mass flow; helium; tungsten; blistering;

    机译：离子注入质量流量氦;钨起泡;

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