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The accurate determination of H diffusivity (D) and Sievert's constant (K(s)) for Carbon Fibre Composites (CFC) is needed in order to track correctly hydrogen isotopes for these candidate Plasma Facing (PF) components. Due to the slow kinetics of hydrogen (H) in CFCs, large measuring times (loading and release) are needed in order to derive D and K(s) for such materials. It results in an increase of experimental costs, and makes it difficult to guarantee sample or system stability during large measuring times. This report presents:

- The FUNDAMENTS of the non-stationary model developed in order to determine D and K(s);
- The VERIFICATION of the developed model for an homogeneous material (Ni);
- The USE of the developed model to OBTAIN apparent values for D and K(s) for the CFCs: N112, N11, NS31 (provided by SEP);
- A further refining of the model in order to take into account CFCs non-homogeneity;
- The determinant role of porosity on the H interaction with matrix.

Additional information

Authors: SEDANO L A, JRC Ispra (IT)
Bibliographic Reference: EUR 17320 EN (1997) 44pp., FS
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT), Fax: +39-332-785818
Record Number: 199710745 / Last updated on: 1997-06-23
Original language: en
Available languages: en
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