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Advances in Condensed Matter Physics
Volume 2014 (2014), Article ID 506936, 6 pages
Research Article

Evolution of Helium with Temperature in Neutron-Irradiated 10B-Doped Aluminum by Small-Angle X-Ray Scattering

1College of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, China
2Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
3Key Laboratory of Neutron Physics, China Academy of Engineering Physics, Mianyang 621900, China
4China Academy of Engineering Physics, Mianyang 621900, China
5Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received 28 February 2014; Revised 20 May 2014; Accepted 5 June 2014; Published 22 June 2014

Academic Editor: Xiao-Tao Zu

Copyright © 2014 Chaoqiang Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Helium status is the primary effect of material properties under radiation. 10B-doped aluminum samples were prepared via arc melting technique and rapidly cooled with liquid nitrogen to increase the boron concentration during the formation of compounds. An accumulated helium concentration of ~6.2 × 1025 m−3 was obtained via reactor neutron irradiation with the reaction of 10B(n, α)7Li. Temperature-stimulated helium evolution was observed via small-angle X-ray scattering (SAXS) and was confirmed via transmission electron microscopy (TEM). The SAXS results show that the volume fraction of helium bubbles significantly increased with temperature. The amount of helium bubbles reached its maximum at 600°C, and the most probable diameter of the helium bubbles increased with temperature until 14.6 nm at 700°C. A similar size distribution of helium bubbles was obtained via TEM after in situ SAXS measurement at 700°C, except that the most probable diameter was 3.9 nm smaller.