Compatibility of materials for fusion reactors with Pb–17Li

Tungsten and SiCf/SiC composite are materials considered for fusion reactors. It is therefore required to assess the corrosion behavior of these materials in contact with Pb–17Li. Corrosion tests of tungsten and SiCf/SiC composites in the presence of isothermal stagnant liquid Pb–17Li have been performed. Under the tested conditions, in the 450–800 °C temperature range, the dissolution of tungsten is very limited. Furthermore, no formation of reaction products and no liquid metal penetration have been observed. As far as the SiCf/SiC composite is concerned, no reaction with the liquid has been observed at 800 °C. A Pb–17Li penetration has been detected in the open porosity of the cut material.