The aim of this work is the development, optimization and validation of an advanced Wf/Cu metal-matrix composite (MMC) as an efficient high temperature heat sink material for future fusion reactors like DEMO. The main focus is the interface optimization between the W fibers and the Cu matrix of the MMC for enhanced adhesion, resulting in good mechanical properties of the compound. The optimization consists of, first, tailoring the nanoscopic interface by depositing different interlayers to achieve a form closure plus adhesive bond, and second, by nano- and microstructuring of the fiber to improve the mechanical interlocking. Therefore, different interface and microstructuring concepts were developed, realized, characterized on several length scales and mechanically validated. The optimal concepts were unified in MMCs, processed in monoblock mock-ups and tested under high heat fluxes.
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The aim of this work is the development, optimization and validation of an advanced Wf/Cu metal-matrix composite (MMC) as an efficient high temperature heat sink material for future fusion reactors like DEMO. The main focus is the interface optimization between the W fibers and the Cu matrix of the MMC for enhanced adhesion, resulting in good mechanical properties of the compound. The optimization consists of, first, tailoring the nanoscopic interface by depositing different interlayers to achie...
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