Počet záznamů: 1

Radiation damage evolution in pure W and W-Cr-Hf alloy caused by 5 MeV Au ions in a broad range of dpa

SYSNO ASEP	0548998
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Radiation damage evolution in pure W and W-Cr-Hf alloy caused by 5 MeV Au ions in a broad range of dpa
Tvůrce(i)	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, ORCID}
Celkový počet autorů	15
Číslo článku	101085
Zdroj.dok.	Nuclear Materials and Energy. - : Elsevier Roč. 29, DEC (2021)
Poč.str.	15 s.
Forma vydání	Online - E
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	fusion materials ; radiation damage ; structure analysis of defects ; W and W-Cr alloy ion irradiation
Vědní obor RIV	BG - Jaderná, atomová a mol. fyzika, urychlovače
Obor OECD	Nuclear physics
Vědní obor RIV – spolupráce	Ústav fyziky plazmatu - Hutnictví, kovové materiály Fyzikální ústav - Fyzika pevných látek a magnetismus
CEP	LM2015056 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	LM2018110 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Výzkumná infrastruktura	CANAM II - 90056 - Ústav jaderné fyziky AV ČR, v. v. i.
Způsob publikování	Open access
Institucionální podpora	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
Anotace	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.
Pracoviště	Ústav jaderné fyziky
Kontakt	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Rok sběru	2022
Elektronická adresa	https://doi.org/10.1016/j.nme.2021.101085

Počet záznamů: 1