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| Home > Publications database > Field Assisted Sintering Technique/Spark Plasma Sintering (FAST/SPS) of self-passivating tungsten alloys for future fusion power plants |
| Home > Publications database > Field Assisted Sintering Technique/Spark Plasma Sintering (FAST/SPS) of self-passivating tungsten alloys for future fusion power plants |
| Conference Presentation (Other) | FZJ-2023-02301 |
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2022
Abstract: In future fusion power plants, plasma-facing materials for the first wall of the reactor have to withstand extreme conditions combining long-term stability during regular operation and suppressed oxidation in the case of an accident. Self-passivating metal alloys with reduced thermo-oxidation (SMART) are promising candidates. Based on tungsten as matrix material, the alloys contain chromium as passivating element and yttrium as active element. Recently, it has been shown that submicron grain sizes led to the best oxidation resistance. Processing of such kind of materials is challenging. Here, field assisted sintering technology/spark plasma sintering (FAST/SPS) of mechanically alloyed tungsten, chromium and yttrium powders was applied to produce submicron grained SMART materials with homogeneous microstructure and well-balanced properties. Main factors influencing the processing of SMART materials via FAST/SPS are discussed and first attempts to scale up the technology (100 x 100 mm2) are presented. Finally, oxidation resistance under accident conditions was investigated.
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