Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis
The evolution of the tungsten microstructure and properties under helium irradiation could cause problems for both operational and safety reasons in fusion reactors. In particular, the presence of helium bubbles, formed mainly in the subsurface area, modifies the mechanical and retention properties...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Nuclear Materials and Energy |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179123001722 |
| _version_ | 1827593652163051520 |
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| author | L. Corso S. Curiotto E. Bernard M. Cabie C. Martin L. Martinelli F. Cheynis P. Muller F. Leroy |
| author_facet | L. Corso S. Curiotto E. Bernard M. Cabie C. Martin L. Martinelli F. Cheynis P. Muller F. Leroy |
| author_sort | L. Corso |
| collection | DOAJ |
| description | The evolution of the tungsten microstructure and properties under helium irradiation could cause problems for both operational and safety reasons in fusion reactors. In particular, the presence of helium bubbles, formed mainly in the subsurface area, modifies the mechanical and retention properties of radioactive elements. In that context we have investigated the shape of helium bubbles in tungsten induced by helium irradiation under well-defined experimental conditions. We have used single crystals with controlled bombardment energy, flux, fluence and post-irradiation annealing at high temperature under ultra-high vacuum in order to get closer to the thermodynamic equilibrium of the helium bubbles. The bubble shape has been characterized by a combination of TEM and 3D reciprocal space map by in-situ GISAXS. We have shown the presence of facetted bubbles exposing {110} and {100} facets of similar size. Using Wulff theorem and experimental results from both techniques, we derive a surface energy ratio of γ100γ110= 1.03 ± 0.03. |
| first_indexed | 2024-03-09T02:14:46Z |
| format | Article |
| id | doaj.art-7cf86c615a70459c9eaaa1641f34c3f6 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-03-09T02:14:46Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-7cf86c615a70459c9eaaa1641f34c3f62023-12-07T05:28:56ZengElsevierNuclear Materials and Energy2352-17912023-12-0137101533Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysisL. Corso0S. Curiotto1E. Bernard2M. Cabie3C. Martin4L. Martinelli5F. Cheynis6P. Muller7F. Leroy8CEA, IRFM, F-13108 Saint Paul-lez-Durance, France; Aix Marseille Université, CNRS, CINAM, Marseille, France; Corresponding author at: CEA, IRFM, F-13108 Saint Paul-lez-Durance, France.Aix Marseille Université, CNRS, CINAM, Marseille, FranceCEA, IRFM, F-13108 Saint Paul-lez-Durance, FranceAix Marseille Univ., CNRS, Centrale Marseille, FSCM (FR1739), CP2M, Marseille, FranceAix Marseille Univ., CNRS, PIIM, UMR 7345, Marseille, FranceInstitut Néel CNRS/UGA UPR2940, 38000 Grenoble, FranceAix Marseille Université, CNRS, CINAM, Marseille, FranceAix Marseille Université, CNRS, CINAM, Marseille, FranceAix Marseille Université, CNRS, CINAM, Marseille, FranceThe evolution of the tungsten microstructure and properties under helium irradiation could cause problems for both operational and safety reasons in fusion reactors. In particular, the presence of helium bubbles, formed mainly in the subsurface area, modifies the mechanical and retention properties of radioactive elements. In that context we have investigated the shape of helium bubbles in tungsten induced by helium irradiation under well-defined experimental conditions. We have used single crystals with controlled bombardment energy, flux, fluence and post-irradiation annealing at high temperature under ultra-high vacuum in order to get closer to the thermodynamic equilibrium of the helium bubbles. The bubble shape has been characterized by a combination of TEM and 3D reciprocal space map by in-situ GISAXS. We have shown the presence of facetted bubbles exposing {110} and {100} facets of similar size. Using Wulff theorem and experimental results from both techniques, we derive a surface energy ratio of γ100γ110= 1.03 ± 0.03.http://www.sciencedirect.com/science/article/pii/S2352179123001722TungstenHeliumMicrostructure evolutionBubblesGISAXSEquilibrium shape |
| spellingShingle | L. Corso S. Curiotto E. Bernard M. Cabie C. Martin L. Martinelli F. Cheynis P. Muller F. Leroy Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis Nuclear Materials and Energy Tungsten Helium Microstructure evolution Bubbles GISAXS Equilibrium shape |
| title | Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis |
| title_full | Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis |
| title_fullStr | Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis |
| title_full_unstemmed | Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis |
| title_short | Tungsten evolution under helium irradiation: Shape of bubbles by TEM and in-situ GISAXS analysis |
| title_sort | tungsten evolution under helium irradiation shape of bubbles by tem and in situ gisaxs analysis |
| topic | Tungsten Helium Microstructure evolution Bubbles GISAXS Equilibrium shape |
| url | http://www.sciencedirect.com/science/article/pii/S2352179123001722 |
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