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Helium bubble formation and evolution in NiMo-Y2O3 alloy under He ion irradiation |
| Awen Liu(刘阿文)1,2,3, Hefei Huang(黄鹤飞)2,3,†, Jizhao Liu(刘继召)2,3, Zhenbo Zhu(朱振博)2,3, and Yan Li(李燕)1,2,3,‡ |
1 School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China;
2 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;
3 School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract We report helium ion irradiation experiments for a new type of dispersion-strengthened NiMo-Y2O3 alloy with three different irradiation doses and varying irradiation dose rates at 750 ℃ to evaluate its helium-induced damage behavior. Transmission electron microscopy was used to reveal the evolution of helium bubbles after irradiation. The experimental results show that with increasing ion dose, the number density of helium bubbles increases continuously. However, the mean size of helium bubbles first increases and then decreases, mainly due to the varied ion dose rates. The volume fractions of helium bubbles in the three investigated samples after irradiation are 0.15%, 0.32%, and 0.27%, which are lower than that of the Hastelloy N alloy (0.58%) after similar irradiation conditions. This indicates that the NiMo-Y2O3 alloy exhibits better helium-induced-swelling resistance than the Hastelloy N alloy, highlighting its potential applicability to MSRs, from the perspective of irradiation performance.
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Received: 08 October 2021
Revised: 29 October 2021
Accepted manuscript online: 04 November 2021
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PACS:
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61.82.-d
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(Radiation effects on specific materials)
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61.80.Lj
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(Atom and molecule irradiation effects)
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61.72.U-
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(Doping and impurity implantation)
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61.80.Jh
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(Ion radiation effects)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 12022515, 11975304, and 91126012) and the Youth Innovation Promotion Association, CAS (Grant No. 202063). |
Corresponding Authors:
Hefei Huang, Yan Li
E-mail: huanghefei@sinap.ac.cn;liyan@sinap.ac.cn
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Cite this article:
Awen Liu(刘阿文), Hefei Huang(黄鹤飞), Jizhao Liu(刘继召), Zhenbo Zhu(朱振博), and Yan Li(李燕) Helium bubble formation and evolution in NiMo-Y2O3 alloy under He ion irradiation 2022 Chin. Phys. B 31 046102
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