Diffusivity and Solubility of Hydrogen in the Carbon Fibre Composite SEP N11
Fusion Science and Technology / Volume 28 / Number 3P2 / October 1995 / Pages 1108-1113
Tritium Properties and Interaction with Material / Proceedings of the Fifth Topical Meeting on Tritium Technology In Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 / dx.doi.org/10.13182/FST95-A30555
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In this paper we present the hydrogen diffusivity and solubility in the carbon fibre composite (CFC) SEP N11 with tri-directional fibres structure that is a possible candidate as armour material for plasma facing components (PFC). The technique used for these measurements is a gas evolution method and the measurements were carried out in the temperature range 900 – 1200 K with a loading hydrogen pressure of 100 kPa. The results obtained showed that the Sieverts' constant Ks is of the same order of magnitude as those previously obtained for several graphites, while the diffusivity is about five to six orders of magnitude higher as compared to graphites. Furthermore, CFC presents an endothermic behaviour in contrast to graphites.
