TY  - JOUR
AU  - Richou, M.
AU  - Gallay, F.
AU  - Böswirth, B.
AU  - Chu, I.
AU  - Dose, G.
AU  - Greuner, H.
AU  - Kermouche, G.
AU  - Lenci, M.
AU  - Loewenhoff, Th.
AU  - Maestracci, R.
AU  - Meillot, E.
AU  - Missirlian, M.
AU  - Pastor, J. Y.
AU  - Quet, A.
AU  - Roccella, S.
AU  - Tejado, E.
AU  - Visca, E.
AU  - Pintsuk, G.
AU  - You, J. H.
AU  - Wirtz, Marius
TI  - Performance assessment of thick W/Cu graded interlayer for DEMO divertor target
JO  - Fusion engineering and design
VL  - 157
SN  - 0920-3796
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2020-02427
SP  - 111610 -
PY  - 2020
AB  - The development of a divertor target for DEMO is of great importance, being able to sustain the harsh environment that is imposed on this component. To fulfill the loading requirements, different concepts were developed within the EUROfusion WPDIV project. The baseline concept is based on the ITER divertor target W-monoblock design. It is made of tungsten as armour material, CuCrZr as structural material and Cu-OFHC as compliant layer. One of the proposed alternative concepts aims to minimize the stress at interfaces by replacing the thick copper interlayer by W/Cu functionally graded material (FGM). In this study, the FGM interlayer, with a thickness of 500 μm, is composed of stacked elementary layers with the following three compositions: 25 vol.%W + 75 vol.%Cu, 50 vol.%W + 50 vol.%Cu, 75 vol.%W + 25 vol.%Cu. Several FGM interlayers were studied. In total three monoblock type mock-ups were manufactured. This paper describes the steps needed to manufacture mock-ups and characterization of elementary layers (composition, porosity, Young’s modulus). HHF tests applying up to 1000 cycles at 20 MW/m² and sub-sequent post-mortem examinations were performed to qualify the concept performance.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000552963400015
DO  - DOI:10.1016/j.fusengdes.2020.111610
UR  - https://juser.fz-juelich.de/record/877729
ER  -