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 degreesC 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 degreesC. A Pb-17Li penetration has been detected in the open porosity of the cut material. (C) 2002 Elsevier Science B.V. All rights reserved.