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Radiation damage evolution in pure W and W-Cr-Hf alloy caused by 5 MeV Au ions in a broad range of dpa
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SYSNO ASEP 0548998 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Radiation damage evolution in pure W and W-Cr-Hf alloy caused by 5 MeV Au ions in a broad range of dpa Author(s) Macková, Anna (UJF-V) RID, ORCID, SAI
Fernandes, Sandrina (UJF-V)
Matějíček, Jiří (UFP-V) RID, ORCID
Vilémová, Monika (UFP-V) RID, ORCID
Holý, V. (CZ)
Liedke, M. O. (DE)
Martan, J. (CZ)
Vronka, Marek (FZU-D) ORCID, RID
Potoček, M. (CZ)
Bábor, P. (CZ)
Butterling, M. (DE)
Attallah, A. G. (DE)
Hirschmann, E. (DE)
Wagner, A. (DE)
Havránek, Vladimír (UJF-V) RID, SAI, ORCIDNumber of authors 15 Article number 101085 Source Title Nuclear Materials and Energy. - : Elsevier
Roč. 29, DEC (2021)Number of pages 15 s. Publication form Online - E Language eng - English Country NL - Netherlands Keywords fusion materials ; radiation damage ; structure analysis of defects ; W and W-Cr alloy ion irradiation Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics Subject RIV - cooperation Institute of Plasma Physics - Metallurgy
Institute of Physics - Solid Matter Physics ; MagnetismR&D Projects LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CANAM II - 90056 - Ústav jaderné fyziky AV ČR, v. v. i. Method of publishing Open access Institutional support UJF-V - RVO:61389005 ; UFP-V - RVO:61389021 ; FZU-D - RVO:68378271 UT WOS 000718149900001 EID SCOPUS 85118541621 DOI 10.1016/j.nme.2021.101085 Annotation Pure W and W-Cr-Hf alloy which are prospective materials for nuclear fusion reactors, such as DEMO, were irradiated at room temperature with 5 MeV Au2+ ions with fluences between 4 x 10(14) and 1.3 x 10(16) ions.cm (-2) to generate various levels of lattice damage from about units up to tens of dpa. The distinct character of radiation damage accumulation, microstructure and defect nature have been observed in both pure W and W-Cr-Hf alloys, the latter exhibited interesting ability of damage reorganisation and defect size decrease at the higher ion fluences as determined by positron annihilation spectroscopy (PAS). High radiation damage rate in the irradiated layer has been evidenced in the W samples already at the lower Au-ion fluences compared to W-Cr-Hf samples, where the damage increased in steps with the increasing Au-ion fluence. The distinct defect accumulation was accompanied with the different Au-ion implanted distribution in the irradiated layer determined by Secondary Ion Mass Spectrometry (SIMS) as well as the thermal properties have shown the consequent worsening in the depth in good agreement with the Au-depth concentration profiles. TEM corroborated above mentioned findings, where the sub-surface layer exhibited defect release after the irradiation, the maximum of dislocation loop density has been identified in the depth according the predicted dpa (displacement particles per atom) maximum for the lower Au-ion fluences. Moreover, TEM shows the dislocation density band structure appeared in W-Cr-Hf samples exhibiting the high density defect band according the projected range of the Au-ions simultaneously with the additional layer with larger isolated dislocations pronounced in the higher depth as a growing function of Au-ion fluence. Such phenomenon was not observed in W samples. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2022 Electronic address https://doi.org/10.1016/j.nme.2021.101085
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