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

    Keywords

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

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