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Cyclic heat load testing of improved CFC/Cu bonding for the W 7-X divertor targets

Funded under: FP7-EURATOM


Extensive high heat flux cycling testing of pre-series targets was performed in the neutral beam facility GLADIS to establish the industrial process for the manufacturing of 890 targets, which will be needed for the installation of the WENDELSTEIN 7-X divertor. The targets are manufactured of flat tiles of CFC NB31 as plasma facing material bonded by an Active Metal Casting copper interlayer onto a water-cooled CuCrZr structure. Based on the results of the 3D thermo-mechanical FEM analysis of the CFC/Cu interface, an additional set of 17 full-scale pre-series elements including three design variations was manufactured by PLANSEE SE. The insertion of an additional plastically compliant copper interlayer between the cooling structure and the Active Metal Casting interlayer showed the best results. No critical tile detachment was observed during >5000 cycles at 10 MW/ m{2}. These results demonstrated the sufficient life time of the component for the expected heat load in operation.

Additional information

Authors: GREUNER H, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);BÖSWIRTH B, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);BOSCARY J, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);TIVEY R, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);CHAUDHURI P, Institute for Plasma Research, Gandhinagar (IN);SCHLOSSER J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);FRIEDRICH T, PLANSEE SE, Reutte (AT);PLANKENSTEINER A, PLANSEE SE, Reutte (AT)
Bibliographic Reference: An oral paper given at: Thirteenth International Conference on Fusion Reactor Materials Organised by: CEA Held at: Acropolis Congress Centre, Nice (FR)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: doi:10.1016/j.jnucmat.2008.12.214
Record Number: 200910366 / Last updated on: 2009-09-22
Original language: en
Available languages: en
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