Tungsten coatings for the JET ITER-like wall project

H. Maier, R. Neu, H. Greuner, Ch. Hopf, G.F. Matthews, G. Piazza, T. Hirai, G. Counsell, X. Courtois, R. Mitteau, E. Gauthier, Jari Likonen, G. Maddaluno, V. Philipps, B. Riccardi, C. Ruset

    Research output: Contribution to journalArticleScientificpeer-review

    32 Citations (Scopus)

    Abstract

    In the frame of JET’s ITER-like wall project for most of the divertor surface tungsten coatings are intended to be employed on bidirectionally carbon fibre reinforced carbon substrates.
    Since this is thermomechanically rather mis-matched, a variety of deposition conditions were considered. Mostly in cooperation with industry, five Euratom associations provided 14 different types of samples with respect to production method and coating thickness.
    In a step-wise selection procedure, these were subjected to a thermal screening test and a thermal cycling test in the ion beam facility GLADIS as well as to an ELM-like thermal shock test in the electron beam facility JUDITH.
    A general failure mode is crack formation upon cool-down. Coatings with several microns of thickness show a distinct delamination feature in addition. Further analysis included metallographic investigation, X-ray diffraction for film stress assessment, adhesion testing as well as measurements on the contents of light impurities.
    Original languageEnglish
    Pages (from-to)1246-1250
    JournalJournal of Nuclear Materials
    Volume363-365
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Tungsten
    tungsten
    coatings
    Coatings
    thermal cycling tests
    shock tests
    production engineering
    thermal shock
    crack initiation
    failure modes
    Thermal shock
    Thermal cycling
    carbon fibers
    Crack initiation
    Delamination
    Failure modes
    Ion beams
    Carbon fibers
    Electron beams
    Screening

    Keywords

    • coatings
    • divertor material
    • divertor
    • electron beam
    • JET
    • tungsten
    • ITER
    • fusion energy
    • plasma

    Cite this

    Maier, H., Neu, R., Greuner, H., Hopf, C., Matthews, G. F., Piazza, G., ... Ruset, C. (2007). Tungsten coatings for the JET ITER-like wall project. Journal of Nuclear Materials, 363-365, 1246-1250. https://doi.org/10.1016/j.jnucmat.2007.01.246
    Maier, H. ; Neu, R. ; Greuner, H. ; Hopf, Ch. ; Matthews, G.F. ; Piazza, G. ; Hirai, T. ; Counsell, G. ; Courtois, X. ; Mitteau, R. ; Gauthier, E. ; Likonen, Jari ; Maddaluno, G. ; Philipps, V. ; Riccardi, B. ; Ruset, C. / Tungsten coatings for the JET ITER-like wall project. In: Journal of Nuclear Materials. 2007 ; Vol. 363-365. pp. 1246-1250.
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    title = "Tungsten coatings for the JET ITER-like wall project",
    abstract = "In the frame of JET’s ITER-like wall project for most of the divertor surface tungsten coatings are intended to be employed on bidirectionally carbon fibre reinforced carbon substrates. Since this is thermomechanically rather mis-matched, a variety of deposition conditions were considered. Mostly in cooperation with industry, five Euratom associations provided 14 different types of samples with respect to production method and coating thickness. In a step-wise selection procedure, these were subjected to a thermal screening test and a thermal cycling test in the ion beam facility GLADIS as well as to an ELM-like thermal shock test in the electron beam facility JUDITH. A general failure mode is crack formation upon cool-down. Coatings with several microns of thickness show a distinct delamination feature in addition. Further analysis included metallographic investigation, X-ray diffraction for film stress assessment, adhesion testing as well as measurements on the contents of light impurities.",
    keywords = "coatings, divertor material, divertor, electron beam, JET, tungsten, ITER, fusion energy, plasma",
    author = "H. Maier and R. Neu and H. Greuner and Ch. Hopf and G.F. Matthews and G. Piazza and T. Hirai and G. Counsell and X. Courtois and R. Mitteau and E. Gauthier and Jari Likonen and G. Maddaluno and V. Philipps and B. Riccardi and C. Ruset",
    year = "2007",
    doi = "10.1016/j.jnucmat.2007.01.246",
    language = "English",
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    pages = "1246--1250",
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    Maier, H, Neu, R, Greuner, H, Hopf, C, Matthews, GF, Piazza, G, Hirai, T, Counsell, G, Courtois, X, Mitteau, R, Gauthier, E, Likonen, J, Maddaluno, G, Philipps, V, Riccardi, B & Ruset, C 2007, 'Tungsten coatings for the JET ITER-like wall project', Journal of Nuclear Materials, vol. 363-365, pp. 1246-1250. https://doi.org/10.1016/j.jnucmat.2007.01.246

    Tungsten coatings for the JET ITER-like wall project. / Maier, H.; Neu, R.; Greuner, H.; Hopf, Ch.; Matthews, G.F.; Piazza, G.; Hirai, T.; Counsell, G.; Courtois, X.; Mitteau, R.; Gauthier, E.; Likonen, Jari; Maddaluno, G.; Philipps, V.; Riccardi, B.; Ruset, C.

    In: Journal of Nuclear Materials, Vol. 363-365, 2007, p. 1246-1250.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Tungsten coatings for the JET ITER-like wall project

    AU - Maier, H.

    AU - Neu, R.

    AU - Greuner, H.

    AU - Hopf, Ch.

    AU - Matthews, G.F.

    AU - Piazza, G.

    AU - Hirai, T.

    AU - Counsell, G.

    AU - Courtois, X.

    AU - Mitteau, R.

    AU - Gauthier, E.

    AU - Likonen, Jari

    AU - Maddaluno, G.

    AU - Philipps, V.

    AU - Riccardi, B.

    AU - Ruset, C.

    PY - 2007

    Y1 - 2007

    N2 - In the frame of JET’s ITER-like wall project for most of the divertor surface tungsten coatings are intended to be employed on bidirectionally carbon fibre reinforced carbon substrates. Since this is thermomechanically rather mis-matched, a variety of deposition conditions were considered. Mostly in cooperation with industry, five Euratom associations provided 14 different types of samples with respect to production method and coating thickness. In a step-wise selection procedure, these were subjected to a thermal screening test and a thermal cycling test in the ion beam facility GLADIS as well as to an ELM-like thermal shock test in the electron beam facility JUDITH. A general failure mode is crack formation upon cool-down. Coatings with several microns of thickness show a distinct delamination feature in addition. Further analysis included metallographic investigation, X-ray diffraction for film stress assessment, adhesion testing as well as measurements on the contents of light impurities.

    AB - In the frame of JET’s ITER-like wall project for most of the divertor surface tungsten coatings are intended to be employed on bidirectionally carbon fibre reinforced carbon substrates. Since this is thermomechanically rather mis-matched, a variety of deposition conditions were considered. Mostly in cooperation with industry, five Euratom associations provided 14 different types of samples with respect to production method and coating thickness. In a step-wise selection procedure, these were subjected to a thermal screening test and a thermal cycling test in the ion beam facility GLADIS as well as to an ELM-like thermal shock test in the electron beam facility JUDITH. A general failure mode is crack formation upon cool-down. Coatings with several microns of thickness show a distinct delamination feature in addition. Further analysis included metallographic investigation, X-ray diffraction for film stress assessment, adhesion testing as well as measurements on the contents of light impurities.

    KW - coatings

    KW - divertor material

    KW - divertor

    KW - electron beam

    KW - JET

    KW - tungsten

    KW - ITER

    KW - fusion energy

    KW - plasma

    U2 - 10.1016/j.jnucmat.2007.01.246

    DO - 10.1016/j.jnucmat.2007.01.246

    M3 - Article

    VL - 363-365

    SP - 1246

    EP - 1250

    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

    SN - 0022-3115

    ER -

    Maier H, Neu R, Greuner H, Hopf C, Matthews GF, Piazza G et al. Tungsten coatings for the JET ITER-like wall project. Journal of Nuclear Materials. 2007;363-365:1246-1250. https://doi.org/10.1016/j.jnucmat.2007.01.246