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.
@article{6f4dc380322c46569fef73039505b319,
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",
doi = "10.1088/0031-8949/2007/T128/029",
language = "English",
volume = "2007",
pages = "150--156",
journal = "Physica Scripta",
issn = "0031-8949",
publisher = "Institute of Physics IOP",
number = "T128",

}

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