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This paper presents the hydrogen diffusivity and solubility in the carbon fibre composite (CFC) SEP N112 with random fibres structure that is a possible candidate as armour of plasma facing components (PFCs). These two parameters play an improtant role in the hydrogen retention in the material under investigation. The technique used for these measurements is a gas evolution method. the measurements were carried out in the temperature range 900 K to 1200 K with a loading hydrogen pressure of 100 kPa. The measurements consist of recording the pressure versus time release curve of a previously hydrogen loaded sample. The diffusivity D and the solubility K(s) are obtained by a non-linear fitting of a non-steady diffusion model to the experimental curve. The results obtained showed that the Sieverts' constant K(s) 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 larger when compared to graphites. Furthermore, CFCs present an endothermic behaviour in contrast to graphites.

Additional information

Authors: ALBERICI S, Politecnico di Torino, Dipartimento di Energetica (IT);PERUJO A, JRC Ispra (IT);CAMPOSILVAN J, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 5th Topical Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications, Belgirate (IT), May 28 - June 3, 1995
Availability: Available from (1) as Paper EN 39067 ORA
Record Number: 199610093 / Last updated on: 1996-02-16
Original language: en
Available languages: en