Thermo-mechanical properties of W/Mo markers coatings deposited on bulk W

E. Grigore, C. Ruset, M. Gherendi, D. Chioibasu, A. Hakola

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In the present paper marker structures consisting of W/Mo layers were deposited on bulk W samples by using a modified CMSII method. This technology, compared to standard CMSII, prevents the formation of nano-pore structures at interfaces. The thicknesses of the markers were in the range 20-35 μm to balance the requirements associated with the wall erosion in ITER and thermo-mechanical performances. The coatings structure and composition were evaluated by glow discharge optical emission spectrometry (GDOES), and energy dispersive x-ray spectroscopy measurements (EDX). The adhesion of the coatings to the substrate has been assessed by scratch test method. In order to evaluate their effectiveness as potential markers for fusion applications, the marker coatings have been tested in an electron beam facility at a temperature of 1000 °C and a power density of about 3 MW m-2. A number of 300 pulses with duration of 420 s (35 testing hours) were applied on the marker coated samples.

Original languageEnglish
Article number014028
JournalPhysica Scripta
Volume2016
Issue numberT167
DOIs
Publication statusPublished - 25 Jan 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

markers
Mechanical Properties
Coating
mechanical properties
coatings
Nanopore
X-ray Spectroscopy
Erosion
Electron Beam
Adhesion
Fusion
Substrate
Testing
glow discharges
Evaluate
Requirements
x ray spectroscopy
erosion
light emission
radiant flux density

Keywords

  • high heat flux test
  • ITER divertor
  • W coatings
  • W markers

Cite this

Grigore, E. ; Ruset, C. ; Gherendi, M. ; Chioibasu, D. ; Hakola, A. / Thermo-mechanical properties of W/Mo markers coatings deposited on bulk W. In: Physica Scripta. 2016 ; Vol. 2016, No. T167.
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abstract = "In the present paper marker structures consisting of W/Mo layers were deposited on bulk W samples by using a modified CMSII method. This technology, compared to standard CMSII, prevents the formation of nano-pore structures at interfaces. The thicknesses of the markers were in the range 20-35 μm to balance the requirements associated with the wall erosion in ITER and thermo-mechanical performances. The coatings structure and composition were evaluated by glow discharge optical emission spectrometry (GDOES), and energy dispersive x-ray spectroscopy measurements (EDX). The adhesion of the coatings to the substrate has been assessed by scratch test method. In order to evaluate their effectiveness as potential markers for fusion applications, the marker coatings have been tested in an electron beam facility at a temperature of 1000 °C and a power density of about 3 MW m-2. A number of 300 pulses with duration of 420 s (35 testing hours) were applied on the marker coated samples.",
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Thermo-mechanical properties of W/Mo markers coatings deposited on bulk W. / Grigore, E.; Ruset, C.; Gherendi, M.; Chioibasu, D.; Hakola, A.

In: Physica Scripta, Vol. 2016, No. T167, 014028, 25.01.2016.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Ruset, C.

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AU - Chioibasu, D.

AU - Hakola, A.

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AB - In the present paper marker structures consisting of W/Mo layers were deposited on bulk W samples by using a modified CMSII method. This technology, compared to standard CMSII, prevents the formation of nano-pore structures at interfaces. The thicknesses of the markers were in the range 20-35 μm to balance the requirements associated with the wall erosion in ITER and thermo-mechanical performances. The coatings structure and composition were evaluated by glow discharge optical emission spectrometry (GDOES), and energy dispersive x-ray spectroscopy measurements (EDX). The adhesion of the coatings to the substrate has been assessed by scratch test method. In order to evaluate their effectiveness as potential markers for fusion applications, the marker coatings have been tested in an electron beam facility at a temperature of 1000 °C and a power density of about 3 MW m-2. A number of 300 pulses with duration of 420 s (35 testing hours) were applied on the marker coated samples.

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