Investigation of tungsten coatings on graphite and CFC

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

    Research output: Contribution to journalArticleScientificpeer-review

    41 Citations (Scopus)

    Abstract

    In the frame of JET's ITER-like wall (ILW) project tungsten coatings on carbon fibre reinforced carbon substrates will be used in the divertor and highly loaded areas in the main chamber. Fourteen different types of samples were produced by physical or chemical vapour deposition and vacuum plasma spray (VPS) with coating thickness of 4, 10 and 200 μm.
    Similarly, three different VPS W coatings (200 μm) on two different graphite substrates, were produced for use at the strike-point regions of ASDEX Upgrade. All coatings were subjected to thermal screening and thermal cycling tests in the ion beam facility GLADIS.
    Additionally, the coatings intended for the ILW project were exposed to edge localized mode (ELM)-like thermal loads in the electron beam facility JUDITH. A general failure mode with the CFC substrate is crack formation upon cool-down, whereas the coatings on graphite do not show any crack formation.
    Additionally, metallographic investigations, x-ray diffraction measurements, adhesion testing as well as measurements on the contents of light impurities were performed.
    Original languageEnglish
    Pages (from-to)150-156
    JournalPhysica Scripta
    Volume2007
    Issue numberT128
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    chlorofluorocarbons
    Graphite
    Coating
    tungsten
    graphite
    coatings
    crack initiation
    Substrate
    Spray
    sprayers
    Crack
    Vacuum
    Plasma
    thermal cycling tests
    vacuum
    Carbon Fiber
    Chemical Vapor Deposition
    failure modes
    Failure Mode
    Cycling

    Keywords

    • JET
    • plasma
    • fusion energy
    • fusion reactors
    • ITER
    • plasma toroidal confinement
    • divertor tiles
    • tungsten
    • plasma-wall interactions

    Cite this

    Neu, R., Maier, H., Gauthier, E., Greuner, H., Hirai, T., Hopf, C., ... Ruset, C. (2007). Investigation of tungsten coatings on graphite and CFC. Physica Scripta, 2007(T128), 150-156. https://doi.org/10.1088/0031-8949/2007/T128/029
    Neu, R. ; Maier, H. ; Gauthier, E. ; Greuner, H. ; Hirai, T. ; Hopf, Ch. ; Likonen, Jari ; Maddaluno, G. ; Matthews, G.F. ; Mitteau, R. ; Philipps, V. ; Piazza, G. ; Ruset, C. / Investigation of tungsten coatings on graphite and CFC. In: Physica Scripta. 2007 ; Vol. 2007, No. T128. pp. 150-156.
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    title = "Investigation of tungsten coatings on graphite and CFC",
    abstract = "In the frame of JET's ITER-like wall (ILW) project tungsten coatings on carbon fibre reinforced carbon substrates will be used in the divertor and highly loaded areas in the main chamber. Fourteen different types of samples were produced by physical or chemical vapour deposition and vacuum plasma spray (VPS) with coating thickness of 4, 10 and 200 μm. Similarly, three different VPS W coatings (200 μm) on two different graphite substrates, were produced for use at the strike-point regions of ASDEX Upgrade. All coatings were subjected to thermal screening and thermal cycling tests in the ion beam facility GLADIS. Additionally, the coatings intended for the ILW project were exposed to edge localized mode (ELM)-like thermal loads in the electron beam facility JUDITH. A general failure mode with the CFC substrate is crack formation upon cool-down, whereas the coatings on graphite do not show any crack formation. Additionally, metallographic investigations, x-ray diffraction measurements, adhesion testing as well as measurements on the contents of light impurities were performed.",
    keywords = "JET, plasma, fusion energy, fusion reactors, ITER, plasma toroidal confinement, divertor tiles, tungsten, plasma-wall interactions",
    author = "R. Neu and H. Maier and E. Gauthier and H. Greuner and T. Hirai and Ch. Hopf and Jari Likonen and G. Maddaluno and G.F. Matthews and R. Mitteau and V. Philipps and G. Piazza and C. Ruset",
    year = "2007",
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    Neu, R, Maier, H, Gauthier, E, Greuner, H, Hirai, T, Hopf, C, Likonen, J, Maddaluno, G, Matthews, GF, Mitteau, R, Philipps, V, Piazza, G & Ruset, C 2007, 'Investigation of tungsten coatings on graphite and CFC', Physica Scripta, vol. 2007, no. T128, pp. 150-156. https://doi.org/10.1088/0031-8949/2007/T128/029

    Investigation of tungsten coatings on graphite and CFC. / Neu, R.; Maier, H.; Gauthier, E.; Greuner, H.; Hirai, T.; Hopf, Ch.; Likonen, Jari; Maddaluno, G.; Matthews, G.F.; Mitteau, R.; Philipps, V.; Piazza, G.; Ruset, C.

    In: Physica Scripta, Vol. 2007, No. T128, 2007, p. 150-156.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Investigation of tungsten coatings on graphite and CFC

    AU - Neu, R.

    AU - Maier, H.

    AU - Gauthier, E.

    AU - Greuner, H.

    AU - Hirai, T.

    AU - Hopf, Ch.

    AU - Likonen, Jari

    AU - Maddaluno, G.

    AU - Matthews, G.F.

    AU - Mitteau, R.

    AU - Philipps, V.

    AU - Piazza, G.

    AU - Ruset, C.

    PY - 2007

    Y1 - 2007

    N2 - In the frame of JET's ITER-like wall (ILW) project tungsten coatings on carbon fibre reinforced carbon substrates will be used in the divertor and highly loaded areas in the main chamber. Fourteen different types of samples were produced by physical or chemical vapour deposition and vacuum plasma spray (VPS) with coating thickness of 4, 10 and 200 μm. Similarly, three different VPS W coatings (200 μm) on two different graphite substrates, were produced for use at the strike-point regions of ASDEX Upgrade. All coatings were subjected to thermal screening and thermal cycling tests in the ion beam facility GLADIS. Additionally, the coatings intended for the ILW project were exposed to edge localized mode (ELM)-like thermal loads in the electron beam facility JUDITH. A general failure mode with the CFC substrate is crack formation upon cool-down, whereas the coatings on graphite do not show any crack formation. Additionally, metallographic investigations, x-ray diffraction measurements, adhesion testing as well as measurements on the contents of light impurities were performed.

    AB - In the frame of JET's ITER-like wall (ILW) project tungsten coatings on carbon fibre reinforced carbon substrates will be used in the divertor and highly loaded areas in the main chamber. Fourteen different types of samples were produced by physical or chemical vapour deposition and vacuum plasma spray (VPS) with coating thickness of 4, 10 and 200 μm. Similarly, three different VPS W coatings (200 μm) on two different graphite substrates, were produced for use at the strike-point regions of ASDEX Upgrade. All coatings were subjected to thermal screening and thermal cycling tests in the ion beam facility GLADIS. Additionally, the coatings intended for the ILW project were exposed to edge localized mode (ELM)-like thermal loads in the electron beam facility JUDITH. A general failure mode with the CFC substrate is crack formation upon cool-down, whereas the coatings on graphite do not show any crack formation. Additionally, metallographic investigations, x-ray diffraction measurements, adhesion testing as well as measurements on the contents of light impurities were performed.

    KW - JET

    KW - plasma

    KW - fusion energy

    KW - fusion reactors

    KW - ITER

    KW - plasma toroidal confinement

    KW - divertor tiles

    KW - tungsten

    KW - plasma-wall interactions

    U2 - 10.1088/0031-8949/2007/T128/029

    DO - 10.1088/0031-8949/2007/T128/029

    M3 - Article

    VL - 2007

    SP - 150

    EP - 156

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    IS - T128

    ER -

    Neu R, Maier H, Gauthier E, Greuner H, Hirai T, Hopf C et al. Investigation of tungsten coatings on graphite and CFC. Physica Scripta. 2007;2007(T128):150-156. https://doi.org/10.1088/0031-8949/2007/T128/029