中国物理B ›› 2014, Vol. 23 ›› Issue (3): 36102-036102.doi: 10.1088/1674-1056/23/3/036102

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Microstructure evolution of zircaloy-4 during Ne ion irradiation and annealing：An in situ TEM investigation

申华海a b, 彭述明c, 周晓松c, 孙凯b, 王鲁闽b, 祖小涛a   

  1. a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
    b Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA;
    c Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2013-07-26 修回日期:2013-09-18 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the Key Laboratory of Neutron Physics of China Academy of Engineering Physics (Grant No. 2012AB02), the Fundamental Research Funds for the Central Universities of China (Grant No. ZYGX2012YB017), and the Major Program of the National Natural Science Foundation of China (Grant No. 91126001).

Microstructure evolution of zircaloy-4 during Ne ion irradiation and annealing：An in situ TEM investigation

Shen Hua-Hai (申华海)a b, Peng Shu-Ming (彭述明)c, Zhou Xiao-Song (周晓松)c, Sun Kai (孙凯)b, Wang Lu-Ming (王鲁闽)b, Zu Xiao-Tao (祖小涛)a   

  1. a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
    b Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA;
    c Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2013-07-26 Revised:2013-09-18 Online:2014-03-15 Published:2014-03-15
  • Contact: Zu Xiao-Tao E-mail:xtzu@uestc.edu.cn
  • Supported by:
    Project supported by the Key Laboratory of Neutron Physics of China Academy of Engineering Physics (Grant No. 2012AB02), the Fundamental Research Funds for the Central Universities of China (Grant No. ZYGX2012YB017), and the Major Program of the National Natural Science Foundation of China (Grant No. 91126001).

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摘要： The microstructural evolution of zircaloy-4 was studied, including the amorphization and recrystallization of Zr(Fe, Cr)2 precipitates, and the density of dislocations under in situ Ne ion irradiation and post annealing. The results show that irradiation at a relatively high temperature and dose induces the formation of nanocrystals in pre-amorphized Zr(Fe, Cr)2 precipitates. The recrystallized nanocrystals also have the structure of hcp-Zr(Fe, Cr)2. The formation of the nanocrystals is thought to be the consequence of competition between atomistic disordering and the recrystallization of precipitates under ion irradiation. The free energy of the nanocrystal is lower than that of the amorphous state, which is another reason for the recrystallization of the precipitates. With increased annealing temperature, the density of the nanocrystals is increased. The dislocation density sharply decreases with the increase in the annealing temperature, and its size increases.

关键词: recrystallization, dislocation, radiation damage, zircaloy-4

Abstract: The microstructural evolution of zircaloy-4 was studied, including the amorphization and recrystallization of Zr(Fe, Cr)2 precipitates, and the density of dislocations under in situ Ne ion irradiation and post annealing. The results show that irradiation at a relatively high temperature and dose induces the formation of nanocrystals in pre-amorphized Zr(Fe, Cr)2 precipitates. The recrystallized nanocrystals also have the structure of hcp-Zr(Fe, Cr)2. The formation of the nanocrystals is thought to be the consequence of competition between atomistic disordering and the recrystallization of precipitates under ion irradiation. The free energy of the nanocrystal is lower than that of the amorphous state, which is another reason for the recrystallization of the precipitates. With increased annealing temperature, the density of the nanocrystals is increased. The dislocation density sharply decreases with the increase in the annealing temperature, and its size increases.

Key words: recrystallization, dislocation, radiation damage, zircaloy-4

中图分类号:  (Radiation effects on specific materials)

  • 61.82.-d
81.10.Jt (Growth from solid phases (including multiphase diffusion and recrystallization)) 61.43.Dq (Amorphous semiconductors, metals, and alloys) 61.72.Ff (Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.))