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This paper describes the results of a gas evolution method to study the interaction of hydrogen with the low activation martensitic steel (LAMS), LA12TaLC. The study was performed in the temperature range between 600 and 900 K and at a loading pressure of 1.0 E5 Pa. The results obtained for the hydrogen transport parameters are of the same order of magnitude as that for the DEMO reference structural and FW material, i.e. DIN 1.4914 MANET. As in MANET, a reduction of the diffusivity (and hence the permeability) was found after heat treatment in the presence of hydrogen, at temperatures over about 740 K. This behaviour is linked to the growth of the pre-existing oxide layer. Due to the temperature, the oxidising impurities present in the gas phase (including H(2)O, CO, CO(2)) are able to increase the layer thickness of the samples, creating a permeation barrier.

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: 18th Symposium on Fusion Technology, Karlsruhe (DE), August 22-26, 1994
Availability: Available from (1) as Paper EN 38515 ORA
Record Number: 199511124 / Last updated on: 1995-08-22
Original language: en
Available languages: en
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