Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation
Materials exposed to plasmas in magnetic confinement nuclear reactors will accumulate radiation-induced defects and energetically implanted gas atoms (from the plasma and transmutations), of which insoluble helium (He) is likely to be the most problematic. The large surface-area-to-volume ratio exhi...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/8/12/1052 |
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| author | Emily Aradi Jacob Lewis-Fell Robert W. Harrison Graeme Greaves Anamul H. Mir Stephen E. Donnelly Jonathan A. Hinks |
| author_facet | Emily Aradi Jacob Lewis-Fell Robert W. Harrison Graeme Greaves Anamul H. Mir Stephen E. Donnelly Jonathan A. Hinks |
| author_sort | Emily Aradi |
| collection | DOAJ |
| description | Materials exposed to plasmas in magnetic confinement nuclear reactors will accumulate radiation-induced defects and energetically implanted gas atoms (from the plasma and transmutations), of which insoluble helium (He) is likely to be the most problematic. The large surface-area-to-volume ratio exhibited by nanoporous materials provides an unsaturable sink with the potential to continuously remove both point defects and He. This property enhances the possibilities for these materials to be tailored for high radiation-damage resistance. In order to explore the potential effect of this on the individual ligaments of nanoporous materials, we present results on the response of tungsten (W) nanoparticles (NPs) to 15 keV He ion irradiation. Tungsten foils and various sizes of NPs were ion irradiated concurrently and imaged in-situ via transmission electron microscopy at 750 °C. Helium bubbles were not observed in NPs with diameters less than 20 nm but did form in larger NPs and the foils. No dislocation loops or black spot damage were observed in any NPs up to 100 nm in diameter but were found to accumulate in the W foils. These results indicate that a nanoporous material, particularly one made up of ligaments with characteristic dimensions of 30 nm or less, is likely to exhibit significant resistance to He accumulation and structural damage and, therefore, be highly tolerant to radiation. |
| first_indexed | 2024-04-12T07:10:12Z |
| format | Article |
| id | doaj.art-1a0d517b889949849d8a80680e3c2d65 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-12T07:10:12Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-1a0d517b889949849d8a80680e3c2d652022-12-22T03:42:39ZengMDPI AGNanomaterials2079-49912018-12-01812105210.3390/nano8121052nano8121052Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion IrradiationEmily Aradi0Jacob Lewis-Fell1Robert W. Harrison2Graeme Greaves3Anamul H. Mir4Stephen E. Donnelly5Jonathan A. Hinks6School of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKSchool of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKSchool of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKSchool of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKSchool of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKSchool of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKSchool of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UKMaterials exposed to plasmas in magnetic confinement nuclear reactors will accumulate radiation-induced defects and energetically implanted gas atoms (from the plasma and transmutations), of which insoluble helium (He) is likely to be the most problematic. The large surface-area-to-volume ratio exhibited by nanoporous materials provides an unsaturable sink with the potential to continuously remove both point defects and He. This property enhances the possibilities for these materials to be tailored for high radiation-damage resistance. In order to explore the potential effect of this on the individual ligaments of nanoporous materials, we present results on the response of tungsten (W) nanoparticles (NPs) to 15 keV He ion irradiation. Tungsten foils and various sizes of NPs were ion irradiated concurrently and imaged in-situ via transmission electron microscopy at 750 °C. Helium bubbles were not observed in NPs with diameters less than 20 nm but did form in larger NPs and the foils. No dislocation loops or black spot damage were observed in any NPs up to 100 nm in diameter but were found to accumulate in the W foils. These results indicate that a nanoporous material, particularly one made up of ligaments with characteristic dimensions of 30 nm or less, is likely to exhibit significant resistance to He accumulation and structural damage and, therefore, be highly tolerant to radiation.https://www.mdpi.com/2079-4991/8/12/1052plasma-facing materialsnanoporous materialstungsten nanoparticlesradiation tolerancein-situ TEMhelium bubbles |
| spellingShingle | Emily Aradi Jacob Lewis-Fell Robert W. Harrison Graeme Greaves Anamul H. Mir Stephen E. Donnelly Jonathan A. Hinks Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation Nanomaterials plasma-facing materials nanoporous materials tungsten nanoparticles radiation tolerance in-situ TEM helium bubbles |
| title | Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation |
| title_full | Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation |
| title_fullStr | Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation |
| title_full_unstemmed | Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation |
| title_short | Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation |
| title_sort | enhanced radiation tolerance of tungsten nanoparticles to he ion irradiation |
| topic | plasma-facing materials nanoporous materials tungsten nanoparticles radiation tolerance in-situ TEM helium bubbles |
| url | https://www.mdpi.com/2079-4991/8/12/1052 |
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