中国物理B ›› 2014, Vol. 23 ›› Issue (12): 127806-127806.doi: 10.1088/1674-1056/23/12/127806

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Atomic origins of solid helium bubbles in tungsten

夏敏a c, 郭洪燕a c, 戴勇b, 燕青芝a, 郭立平d, 李铁成d, 乔祎a, 葛昌纯a c   

  1. a Institute of Nuclear Materials, University of Science & Technology Beijing, Beijing 100083, China;
    b Laboratory for Nuclear Materials, Paul Scherrer Institut, 5323 Villigen PSI, Switzerland;
    c Institute of Powder Metallurgy and Advanced Ceramics, Southwest Jiaotong University, Chengdu 610031, China;
    d School of Physics and Technology, Wuhan University, Wuhan 430072, China
  • 收稿日期:2014-11-12 发布日期:2014-12-25
  • 基金资助:

    Project supported by the ITER-National Magnetic Confinement Fusion Program (Grant Nos. 2010GB109000, 2011GB108009, and 2014GB123000) and the National Natural Science Foundation of China (Grant No. 11075119).

Atomic origins of solid helium bubbles in tungsten

Xia Min (夏敏)a c, Guo Hong-Yan (郭洪燕)a c, Dai Yong (戴勇)b, Yan Qing-Zhi (燕青芝)a, Guo Li-Ping (郭立平)d, Li Tie-Cheng (李铁成)d, Qiao Yi (乔祎)a, Ge Chang-Chun (葛昌纯)a c   

  1. a Institute of Nuclear Materials, University of Science & Technology Beijing, Beijing 100083, China;
    b Laboratory for Nuclear Materials, Paul Scherrer Institut, 5323 Villigen PSI, Switzerland;
    c Institute of Powder Metallurgy and Advanced Ceramics, Southwest Jiaotong University, Chengdu 610031, China;
    d School of Physics and Technology, Wuhan University, Wuhan 430072, China
  • Received:2014-11-12 Published:2014-12-25
  • Contact: Xia Min, Ge Chang-Chun E-mail:xmdsg@126.com;ccge@mater.ustb.edu.cn
  • Supported by:

    Project supported by the ITER-National Magnetic Confinement Fusion Program (Grant Nos. 2010GB109000, 2011GB108009, and 2014GB123000) and the National Natural Science Foundation of China (Grant No. 11075119).

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摘要：

Solid helium bubbles were directly observed in the helium ion implanted tungsten (W), by different transmission electron microscopy (TEM) techniques at room temperature. The diameters of these solid helium bubbles range from 1 nm to 8 nm in diameter with the mean bubble size about 3 nm. The selected area electron diffraction (SAED) and fast Fourier transform (FFT) images revealed that solid helium bubbles possess body-centered cubic (bcc) structure with a lattice constant of 0.447 nm. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images further confirmed the existence of helium bubble in tungsten. The present findings provide an atomic level view of the microstructure evolution of helium in the materials, and revealed the existence of solid helium bubbles in materials.

关键词: solid helium bubble, atomic origins, tungsten, TEM, HAADF-STEM

Abstract:

Solid helium bubbles were directly observed in the helium ion implanted tungsten (W), by different transmission electron microscopy (TEM) techniques at room temperature. The diameters of these solid helium bubbles range from 1 nm to 8 nm in diameter with the mean bubble size about 3 nm. The selected area electron diffraction (SAED) and fast Fourier transform (FFT) images revealed that solid helium bubbles possess body-centered cubic (bcc) structure with a lattice constant of 0.447 nm. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images further confirmed the existence of helium bubble in tungsten. The present findings provide an atomic level view of the microstructure evolution of helium in the materials, and revealed the existence of solid helium bubbles in materials.

Key words: solid helium bubble, atomic origins, tungsten, TEM, HAADF-STEM

中图分类号: 

  • 78.70-g
78.90.+t (Other topics in optical properties, condensed matter spectroscopy and other interactions of particles and radiation with condensed matter) 21.90.+f (Other topics in nuclear structure)