Jiang, Menghan, Haq Mir, Anamul, Bahri, Mounib 
ORCID: 0000-0002-8336-9158, Zhang, Yingjie, Browning, Nigel, Whittle, Karl ORCID: 0000-0002-8000-0857 and Patel, Maulik ORCID: 0000-0002-3214-5752
(2023)
Helium bubbles in Gd2Ti2O7 borosilicate glass-ceramic composites.
Journal of Nuclear Materials, 581.
p. 154424.
Abstract
Glass-ceramics have the potential to be the advanced nuclear wasteforms that can incorporate radioactive nuclides for a long-term geological disposal. In order to understand the He accumulation arising from long-term α-decay events, 10 keV in-situ TEM helium implantation experiments were carried out to examine the accumulation of helium bubbles in Gd2Ti2O7 borosilicate glass-ceramics. STEM analysis shows He accumulation in amorphous/crystalline ceramic matrix. Helium bubbles with an average bubble size of 1.2 nm were formed at a fluence of 1.1×1017 He/cm2 within the ceramic matrix. No helium bubbles were observed in either the glass matrix or glass-ceramic interfaces due to the higher He diffusion coefficient in glass. The helium bubbles preferred to accumulate near glass-ceramic interfaces and nucleate along ceramic grain boundaries.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Glass-ceramics, Pyrochlore, He bubbles, In-situ TEM, Nuclear wasteforms |
| Divisions: | Faculty of Science and Engineering > School of Engineering |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 14 May 2023 19:32 |
| Last Modified: | 08 Jun 2023 12:54 |
| DOI: | 10.1016/j.jnucmat.2023.154424 |
| Open Access URL: | https://doi.org/10.1016/j.jnucmat.2023.154424 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3170348 |
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