The influence of N on the D retention within W coatings for fusion applications

E. Grigore (Corresponding Author), M. Gherendi, F. Baiasu, M. Firdaouss, C. Hernandez, A. Weckmann, P. Petersson, A. Hakola

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    Plasma facing components (PFC) in a fusion device are subjected to a harsh operating environment involving high heat fluxes and exposure to high fluxes of hydrogen isotopes. This exposure can lead to high fuel retention that can raise serious concern from the safety point of view. One of the reasons for the use of W as a material for the construction of the first wall is to reduce fuel retention compared to carbon wall. Nitrogen seeding, used during the operation of fusion reactors, represents a method to cool the divertor plasma and to reduce the W source in the divertor due to ELMs. However an exposure of the PFC to a combination of hydrogen isotopes and nitrogen can lead to changes in properties of exposed surfaces or to unexpected material behavior. In this work, the influence of nitrogen on the deuterium content within tungsten coatings produced by reactive high power impulse magnetron sputtering (HIPIMS) was investigated. The deposition process of W coatings in a nitrogen deuterium environment leads to a significant retention of deuterium. Coatings with a deuterium content up to 54 at.% were obtained in the presence of nitrogen compared with a deuterium content of 25 at.% measured for the coatings produced in absence of nitrogen from the deposition atmosphere.

    Original languageEnglish
    Pages (from-to)1959-1962
    Number of pages4
    JournalFusion Engineering and Design
    Volume146
    DOIs
    Publication statusPublished - 1 Sep 2019
    MoE publication typeNot Eligible

    Fingerprint

    Deuterium
    Nitrogen
    Fusion reactions
    Coatings
    Plasmas
    Hydrogen
    Nitrogen Isotopes
    Isotopes
    Tungsten
    Fusion reactors
    Magnetron sputtering
    Heat flux
    Carbon
    Fluxes

    Keywords

    • Deuterium containing coatings
    • HIPIMS
    • Nitrogen seeding
    • Tungsten nitride

    Cite this

    Grigore, E. ; Gherendi, M. ; Baiasu, F. ; Firdaouss, M. ; Hernandez, C. ; Weckmann, A. ; Petersson, P. ; Hakola, A. / The influence of N on the D retention within W coatings for fusion applications. In: Fusion Engineering and Design. 2019 ; Vol. 146. pp. 1959-1962.
    @article{32cfc1cac5e44db096e37dac0a85af77,
    title = "The influence of N on the D retention within W coatings for fusion applications",
    abstract = "Plasma facing components (PFC) in a fusion device are subjected to a harsh operating environment involving high heat fluxes and exposure to high fluxes of hydrogen isotopes. This exposure can lead to high fuel retention that can raise serious concern from the safety point of view. One of the reasons for the use of W as a material for the construction of the first wall is to reduce fuel retention compared to carbon wall. Nitrogen seeding, used during the operation of fusion reactors, represents a method to cool the divertor plasma and to reduce the W source in the divertor due to ELMs. However an exposure of the PFC to a combination of hydrogen isotopes and nitrogen can lead to changes in properties of exposed surfaces or to unexpected material behavior. In this work, the influence of nitrogen on the deuterium content within tungsten coatings produced by reactive high power impulse magnetron sputtering (HIPIMS) was investigated. The deposition process of W coatings in a nitrogen deuterium environment leads to a significant retention of deuterium. Coatings with a deuterium content up to 54 at.{\%} were obtained in the presence of nitrogen compared with a deuterium content of 25 at.{\%} measured for the coatings produced in absence of nitrogen from the deposition atmosphere.",
    keywords = "Deuterium containing coatings, HIPIMS, Nitrogen seeding, Tungsten nitride",
    author = "E. Grigore and M. Gherendi and F. Baiasu and M. Firdaouss and C. Hernandez and A. Weckmann and P. Petersson and A. Hakola",
    year = "2019",
    month = "9",
    day = "1",
    doi = "10.1016/j.fusengdes.2019.03.075",
    language = "English",
    volume = "146",
    pages = "1959--1962",
    journal = "Fusion Engineering and Design",
    issn = "0920-3796",
    publisher = "Elsevier",

    }

    Grigore, E, Gherendi, M, Baiasu, F, Firdaouss, M, Hernandez, C, Weckmann, A, Petersson, P & Hakola, A 2019, 'The influence of N on the D retention within W coatings for fusion applications', Fusion Engineering and Design, vol. 146, pp. 1959-1962. https://doi.org/10.1016/j.fusengdes.2019.03.075

    The influence of N on the D retention within W coatings for fusion applications. / Grigore, E. (Corresponding Author); Gherendi, M.; Baiasu, F.; Firdaouss, M.; Hernandez, C.; Weckmann, A.; Petersson, P.; Hakola, A.

    In: Fusion Engineering and Design, Vol. 146, 01.09.2019, p. 1959-1962.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - The influence of N on the D retention within W coatings for fusion applications

    AU - Grigore, E.

    AU - Gherendi, M.

    AU - Baiasu, F.

    AU - Firdaouss, M.

    AU - Hernandez, C.

    AU - Weckmann, A.

    AU - Petersson, P.

    AU - Hakola, A.

    PY - 2019/9/1

    Y1 - 2019/9/1

    N2 - Plasma facing components (PFC) in a fusion device are subjected to a harsh operating environment involving high heat fluxes and exposure to high fluxes of hydrogen isotopes. This exposure can lead to high fuel retention that can raise serious concern from the safety point of view. One of the reasons for the use of W as a material for the construction of the first wall is to reduce fuel retention compared to carbon wall. Nitrogen seeding, used during the operation of fusion reactors, represents a method to cool the divertor plasma and to reduce the W source in the divertor due to ELMs. However an exposure of the PFC to a combination of hydrogen isotopes and nitrogen can lead to changes in properties of exposed surfaces or to unexpected material behavior. In this work, the influence of nitrogen on the deuterium content within tungsten coatings produced by reactive high power impulse magnetron sputtering (HIPIMS) was investigated. The deposition process of W coatings in a nitrogen deuterium environment leads to a significant retention of deuterium. Coatings with a deuterium content up to 54 at.% were obtained in the presence of nitrogen compared with a deuterium content of 25 at.% measured for the coatings produced in absence of nitrogen from the deposition atmosphere.

    AB - Plasma facing components (PFC) in a fusion device are subjected to a harsh operating environment involving high heat fluxes and exposure to high fluxes of hydrogen isotopes. This exposure can lead to high fuel retention that can raise serious concern from the safety point of view. One of the reasons for the use of W as a material for the construction of the first wall is to reduce fuel retention compared to carbon wall. Nitrogen seeding, used during the operation of fusion reactors, represents a method to cool the divertor plasma and to reduce the W source in the divertor due to ELMs. However an exposure of the PFC to a combination of hydrogen isotopes and nitrogen can lead to changes in properties of exposed surfaces or to unexpected material behavior. In this work, the influence of nitrogen on the deuterium content within tungsten coatings produced by reactive high power impulse magnetron sputtering (HIPIMS) was investigated. The deposition process of W coatings in a nitrogen deuterium environment leads to a significant retention of deuterium. Coatings with a deuterium content up to 54 at.% were obtained in the presence of nitrogen compared with a deuterium content of 25 at.% measured for the coatings produced in absence of nitrogen from the deposition atmosphere.

    KW - Deuterium containing coatings

    KW - HIPIMS

    KW - Nitrogen seeding

    KW - Tungsten nitride

    UR - http://www.scopus.com/inward/record.url?scp=85063037874&partnerID=8YFLogxK

    U2 - 10.1016/j.fusengdes.2019.03.075

    DO - 10.1016/j.fusengdes.2019.03.075

    M3 - Article

    AN - SCOPUS:85063037874

    VL - 146

    SP - 1959

    EP - 1962

    JO - Fusion Engineering and Design

    JF - Fusion Engineering and Design

    SN - 0920-3796

    ER -

    Grigore E, Gherendi M, Baiasu F, Firdaouss M, Hernandez C, Weckmann A et al. The influence of N on the D retention within W coatings for fusion applications. Fusion Engineering and Design. 2019 Sep 1;146:1959-1962. https://doi.org/10.1016/j.fusengdes.2019.03.075