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.",
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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",
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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