Irradiation Damage Independent Deuterium Retention in WMoTaNbV

Anna Liski; Tomi Vuoriheimo; Pasi Jalkanen; Kenichiro Mizohata; Eryang Lu; Jari Likonen; Jouni Heino; Kalle Heinola; Yevhen Zayachuk; Anna Widdowson; Ko-Kai Tseng; Che-Wei Tsai; Jien-Wei Yeh; Filip Tuomisto; Tommy Ahlgren

doi:10.3390/ma15207296

Irradiation Damage Independent Deuterium Retention in WMoTaNbV

Anna Liski^*, Tomi Vuoriheimo, Pasi Jalkanen, Kenichiro Mizohata, Eryang Lu, Jari Likonen, Jouni Heino, Kalle Heinola, Yevhen Zayachuk, Anna Widdowson, Ko-Kai Tseng, Che-Wei Tsai, Jien-Wei Yeh, Filip Tuomisto, Tommy Ahlgren

^*Corresponding author for this work

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Abstract

High entropy alloys are a promising new class of metal alloys with outstanding radiation resistance and thermal stability. The interaction with hydrogen might, however, have desired (H storage) or undesired effects, such as hydrogen-induced embrittlement or tritium retention in the fusion reactor wall. High entropy alloy WMoTaNbV and bulk W samples were used to study the quantity of irradiation-induced trapping sites and properties of D retention by employing thermal desorption spectrometry, secondary ion mass spectrometry, and elastic recoil detection analysis. The D implantation was not found to create additional hydrogen traps in WMoTaNbV as it does in W, while 90 at% of implanted D is retained in WMoTaNbV, in contrast to 35 at% in W. Implantation created damage predicted by SRIM is 0.24 dpa in WMoTaNbV, calculated with a density of 6.044×1022 atoms/cm3. The depth of the maximum damage was 90 nm. An effective trapping energy for D in WMoTaNbV was found to be about 1.7 eV, and the D emission temperature was close to 700 °C.

Original language	English
Article number	7296
Journal	Materials
Volume	15
Issue number	20
DOIs	https://doi.org/10.3390/ma15207296
Publication status	Published - 19 Oct 2022
MoE publication type	A1 Journal article-refereed

Funding

This work was financially supported by the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) and from the Project NSTC 111-2634-F-007-008-by National Science and Technology Council (NSTC) in Taiwan. This work has been carried out within the framework of the EUROfusion consortium and has received funding from the Euratom research and training programm 2014–2018 and 2019–2020 under grant agreement No 633053. This work was supported by Tekniikan edistämissäätiö and Waldemar von Frenkells stiftelse. Partial funding from Academy of Finland grants 315082, 321659 and 333228 is acknowledged. Open access funding provided by University of Helsinki.

Keywords

deuterium
elastic recoil
fusion
high entropy alloy
hydrogen
metals
secondary ion
thermal desorption

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Materials2022_Liski

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title = "Irradiation Damage Independent Deuterium Retention in WMoTaNbV",

abstract = "High entropy alloys are a promising new class of metal alloys with outstanding radiation resistance and thermal stability. The interaction with hydrogen might, however, have desired (H storage) or undesired effects, such as hydrogen-induced embrittlement or tritium retention in the fusion reactor wall. High entropy alloy WMoTaNbV and bulk W samples were used to study the quantity of irradiation-induced trapping sites and properties of D retention by employing thermal desorption spectrometry, secondary ion mass spectrometry, and elastic recoil detection analysis. The D implantation was not found to create additional hydrogen traps in WMoTaNbV as it does in W, while 90 at% of implanted D is retained in WMoTaNbV, in contrast to 35 at% in W. Implantation created damage predicted by SRIM is 0.24 dpa in WMoTaNbV, calculated with a density of 6.044×1022 atoms/cm3. The depth of the maximum damage was 90 nm. An effective trapping energy for D in WMoTaNbV was found to be about 1.7 eV, and the D emission temperature was close to 700 °C.",

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AU - Liski, Anna

AU - Vuoriheimo, Tomi

AU - Jalkanen, Pasi

AU - Mizohata, Kenichiro

AU - Lu, Eryang

AU - Likonen, Jari

AU - Heino, Jouni

AU - Heinola, Kalle

AU - Zayachuk, Yevhen

AU - Widdowson, Anna

AU - Tseng, Ko-Kai

AU - Tsai, Che-Wei

AU - Yeh, Jien-Wei

AU - Tuomisto, Filip

AU - Ahlgren, Tommy

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N2 - High entropy alloys are a promising new class of metal alloys with outstanding radiation resistance and thermal stability. The interaction with hydrogen might, however, have desired (H storage) or undesired effects, such as hydrogen-induced embrittlement or tritium retention in the fusion reactor wall. High entropy alloy WMoTaNbV and bulk W samples were used to study the quantity of irradiation-induced trapping sites and properties of D retention by employing thermal desorption spectrometry, secondary ion mass spectrometry, and elastic recoil detection analysis. The D implantation was not found to create additional hydrogen traps in WMoTaNbV as it does in W, while 90 at% of implanted D is retained in WMoTaNbV, in contrast to 35 at% in W. Implantation created damage predicted by SRIM is 0.24 dpa in WMoTaNbV, calculated with a density of 6.044×1022 atoms/cm3. The depth of the maximum damage was 90 nm. An effective trapping energy for D in WMoTaNbV was found to be about 1.7 eV, and the D emission temperature was close to 700 °C.

AB - High entropy alloys are a promising new class of metal alloys with outstanding radiation resistance and thermal stability. The interaction with hydrogen might, however, have desired (H storage) or undesired effects, such as hydrogen-induced embrittlement or tritium retention in the fusion reactor wall. High entropy alloy WMoTaNbV and bulk W samples were used to study the quantity of irradiation-induced trapping sites and properties of D retention by employing thermal desorption spectrometry, secondary ion mass spectrometry, and elastic recoil detection analysis. The D implantation was not found to create additional hydrogen traps in WMoTaNbV as it does in W, while 90 at% of implanted D is retained in WMoTaNbV, in contrast to 35 at% in W. Implantation created damage predicted by SRIM is 0.24 dpa in WMoTaNbV, calculated with a density of 6.044×1022 atoms/cm3. The depth of the maximum damage was 90 nm. An effective trapping energy for D in WMoTaNbV was found to be about 1.7 eV, and the D emission temperature was close to 700 °C.

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KW - elastic recoil

KW - fusion

KW - high entropy alloy

KW - hydrogen

KW - metals

KW - secondary ion

KW - thermal desorption

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JO - Materials

JF - Materials

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ER -

Irradiation Damage Independent Deuterium Retention in WMoTaNbV

Abstract

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Keywords

UN SDGs

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