Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography
Atom Probe Tomography has been used to study the effect of fast neutron irradiation on the local chemistry of Nb3Sn samples. Two RRP® wires doped with 2 at% Ti were analysed, one in the as-received condition and the other irradiated to a neutron fluence (E>0.1MeV) of 2.82x1022 m-2 in the TRIGA-II...
| Main Authors: | , , , , , |
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| Format: | Dataset |
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University of Oxford
2023
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| _version_ | 1826310187361763328 |
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| author | Wheatley, L E Baumgartner, T Eisterer, M Speller, S C Moody, M P Grovenor, C R M |
| author_facet | Wheatley, L E Baumgartner, T Eisterer, M Speller, S C Moody, M P Grovenor, C R M |
| author_sort | Wheatley, L E |
| collection | OXFORD |
| description | Atom Probe Tomography has been used to study the effect of fast neutron irradiation on the local chemistry of Nb3Sn samples. Two RRP® wires doped with 2 at% Ti were analysed, one in the as-received condition and the other irradiated to a neutron fluence (E>0.1MeV) of 2.82x1022 m-2 in the TRIGA-II reactor. The irradiated sample had a reduced Tc, an increase in Fp, a shift in the peak of the Fp curve suggesting the introduction of secondary point pinning, and an increase in the estimated scaling field B*. Atom Probe Tomography analysis has shown that polycrystalline Nb3Sn has three distinct regions of composition, near stoichiometry Nb3Sn (low Nb), regions with a higher Nb content than expected in equilibrium Nb3Sn (high Nb) and grain boundaries. The summed composition of these three regions lies within the Nb3Sn phase for both the as-received and irradiated samples. The distinct regions of high Nb Nb3Sn demonstrate incomplete diffusion in the as-received sample, and the reduction in volume of these high Nb regions after irradiation implies significant radiation induced diffusion has occurred. The occurrence presence of other features in the atomic-scale chemistry, such as the extent of Cu segregation at grain boundaries, and to three types of dislocation array, and unreacted Nb nanoparticles, are compared between samples. |
| first_indexed | 2024-03-07T07:46:52Z |
| format | Dataset |
| id | oxford-uuid:6168e20a-141e-4953-bbe5-3033cf505bcd |
| institution | University of Oxford |
| last_indexed | 2024-03-07T07:46:52Z |
| publishDate | 2023 |
| publisher | University of Oxford |
| record_format | dspace |
| spelling | oxford-uuid:6168e20a-141e-4953-bbe5-3033cf505bcd2023-06-20T14:14:57ZUnderstanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe TomographyDatasethttp://purl.org/coar/resource_type/c_ddb1uuid:6168e20a-141e-4953-bbe5-3033cf505bcdORAUniversity of Oxford2023Wheatley, L EBaumgartner, TEisterer, MSpeller, S CMoody, M PGrovenor, C R MAtom Probe Tomography has been used to study the effect of fast neutron irradiation on the local chemistry of Nb3Sn samples. Two RRP® wires doped with 2 at% Ti were analysed, one in the as-received condition and the other irradiated to a neutron fluence (E>0.1MeV) of 2.82x1022 m-2 in the TRIGA-II reactor. The irradiated sample had a reduced Tc, an increase in Fp, a shift in the peak of the Fp curve suggesting the introduction of secondary point pinning, and an increase in the estimated scaling field B*. Atom Probe Tomography analysis has shown that polycrystalline Nb3Sn has three distinct regions of composition, near stoichiometry Nb3Sn (low Nb), regions with a higher Nb content than expected in equilibrium Nb3Sn (high Nb) and grain boundaries. The summed composition of these three regions lies within the Nb3Sn phase for both the as-received and irradiated samples. The distinct regions of high Nb Nb3Sn demonstrate incomplete diffusion in the as-received sample, and the reduction in volume of these high Nb regions after irradiation implies significant radiation induced diffusion has occurred. The occurrence presence of other features in the atomic-scale chemistry, such as the extent of Cu segregation at grain boundaries, and to three types of dislocation array, and unreacted Nb nanoparticles, are compared between samples. |
| spellingShingle | Wheatley, L E Baumgartner, T Eisterer, M Speller, S C Moody, M P Grovenor, C R M Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography |
| title | Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography |
| title_full | Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography |
| title_fullStr | Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography |
| title_full_unstemmed | Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography |
| title_short | Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using Atom Probe Tomography |
| title_sort | understanding the nanoscale chemistry of as received and fast neutron irradiated nb3sn rrp r wires using atom probe tomography |
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