Tungsten–microdiamond composites for plasma facing components
| Autor: | J.B. Correia, Horacio Fernandes, U. V. Mardolcar, Carlos A. Silva, Nobumitsu Shohoji, Rodrigo Mateus, Vanessa Livramento, Daniela Nunes, K. Hanada, Eduardo Alves, Patricia Almeida Carvalho |
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| Rok vydání: | 2011 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Divertor Spark plasma sintering chemistry.chemical_element Fusion power Tungsten chemistry.chemical_compound Thermal conductivity Nuclear Energy and Engineering chemistry Tungsten carbide Sputtering General Materials Science Composite material Nanodiamond |
| Zdroj: | Journal of Nuclear Materials. 416:45-48 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2011.02.031 |
| Popis: | Tungsten is considered as one of promising candidate materials for plasma facing component in nuclear fusion reactors due to its resistance to sputtering and high melting point. High thermal conductivity is also a prerequisite for plasma facing components under the unique service environment of fusion reactor characterised by the massive heat load, especially in the divertor area. The feasibility of mechanical alloying of nanodiamond and tungsten, and the consolidation of the composite powders with Spark Plasma Sintering (SPS) was previously demonstrated. In the present research we report on the use of microdiamond instead of nanodiamond in such composites. Microdiamond is more favourable than nanodiamond in view of phonon transport performance leading to better thermal conductivity. However, there is a trade off between densification and thermal conductivity as the SPS temperature increases tungsten carbide formation from microdiamond is accelerated inevitably while the consolidation density would rise. |
| Databáze: | OpenAIRE |
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