Atomic origins of solid helium bubbles in tungsten |
| |
| Authors: | Xia Min Guo Hong-Yan Dai Yong Yan Qing-Zhi Guo Li-Ping Li Tie-Cheng Qiao Yi Ge Chang-Chun |
| |
| Affiliation: | Xia Min;Guo Hong-Yan;Dai Yong;Yan Qing-Zhi;Guo Li-Ping;Li Tie-Cheng;Qiao Yi;Ge Chang-Chun;Institute of Nuclear Materials, University of Science & Technology Beijing;Institute of Powder Metallurgy and Advanced Ceramics, Southwest Jiaotong University;Laboratory for Nuclear Materials, Paul Scherrer Institut;School of Physics and Technology, Wuhan University; |
| |
| 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 from1 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. |
| |
| Keywords: | solid helium bubble atomic origins tungsten TEM HAADF-STEM |
| 本文献已被 CNKI 维普 等数据库收录！ |
