EVALUATION OF SILICON DOPED CFCS FOR PLASMA-FACING MATERIAL

To improve the CFCs characteristics of chemical erosion, tritium reten tion, and H2O/air resistivity, silicon doped CFCs were developed in th e framework of European Fusion Technology programme. The tritium reten tion, H2O reaction kinetics, outgassing behaviour and depletion of sil icon in doped CFCs were investigated as a function of silicon concentr ation and temperature. The results show that silicon in bulk of CFCs d ecreases the tritium bulk retention and the H2O reactivity. However, i t has been observed that the concentration of silicon is slightly decr eased at elevated temperature. This paper presents the experimental re sults and the consequence is discussed.