Effects of composition complexity of single-phase concentrated solid solution alloys on He bubbles behavior

Three types of single-phase concentrated solid solution alloys (SP-CSAs) with compositions of NiCoFe, NiCoFeCr and NiCoFeCrMn were prepared using the vacuum arc melting method. The bulk samples were implanted by 100 keV helium ions to a fluence of 5 × 1016 ions/cm2 at 673 K. The transmission electro...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2024-08, Vol.553, p.165389, Article 165389
Main Authors: Zhang, Boyu, Jiang, Shengming, Hu, Xiaotian, Wu, Zhongzheng, Huang, Zijing, Dong, Shigang, Song, Yushou, Zhang, Jian
Format: Article
Language:English
Subjects:
Bubble size
Helium bubbles
Irradiation
Solid solution alloys
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Summary:Three types of single-phase concentrated solid solution alloys (SP-CSAs) with compositions of NiCoFe, NiCoFeCr and NiCoFeCrMn were prepared using the vacuum arc melting method. The bulk samples were implanted by 100 keV helium ions to a fluence of 5 × 1016 ions/cm2 at 673 K. The transmission electron microscopy (TEM) is employed to systematically characterize helium bubbles along the depth of implantation. The observation results revealed that the He bubble density followed the sequence NiCoFeCr > NiCoFeCrMn > NiCoFe, and the bubble sizes exhibited the trend NiCoFe > NiCoFeCrMn > NiCoFeCr. For NiCoFe and NiCoFeCr, the higher the number complexity of components, the higher the density and the smaller the size of He bubbles. However, the introduction of Mn as a larger-sized atom appeared to increase the vacancy diffusivity and lower the melting temperature, consequently promoting helium bubble growth.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2024.165389