Abstract
The diffusion and permeation behaviour of tritium through the films of TiC and TiN + TiC coated on surface of 316L stainless steel by chemical vapour deposition has been described. The permeability of tritium through these two kinds of films is low and is five to six orders of magnitude lower than that in bulk at 200–500°C. The films have good compatibility with the bulk, high resistance to thermal shock and irradiation. They can be used as clad materials of the tritium breeder in the breeder irradiation container in a fusion reactor tritium technology study and as candidate materials of the first wall in a fusion reactor study.
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