4.5 Article Proceedings Paper

Melt infiltrated tungsten-copper composites as advanced heat sink materials for plasma facing components of future nuclear fusion devices

Journal

FUSION ENGINEERING AND DESIGN
Volume 124, Issue -, Pages 455-459

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.fusengdes.2017.01.042

Keywords

Tungsten; Copper; Composite material; Plasma facing component; Heat sink

Funding

  1. Euratom research and training programme [633053]

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The exhaust of power and particles is regarded as a major challenge in view of the design of a magnetic confinement nuclear fusion demonstration power plant (DEMO). In such a reactor, highly loaded plasma facing components (PFCs), like the divertor targets, have to withstand both severe heat flux loads and considerable neutron irradiation. Existing divertor target designs make use of monolithic tungsten (W) and copper (Cu) material grades that are combined in a PFC. Such an approach, however, bears engineering difficulties as W and Cu are materials with inherently different thermomechanical properties and their optimum operating temperature windows do not overlap. Against this background, W Cu composite materials are promising candidates regarding the application to the heat sink of highly loaded PFCs. The present contribution summarises recent results regarding the manufacturing and characterisation of such W Cu composite materials produced by means of liquid Cu melt infiltration of open porous W preforms. On the one hand, this includes composites manufactured by infiltrating powder metallurgically produced W skeletons. On the other hand, W Cu composites based on textile technologically produced fibrous reinforcement preforms are discussed. (C) 2017 The Author(s). Published by Elsevier B.V.

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