Development of a hydrogen absorbing layer in the outer shell of high pressure hydrogen tanks

This study is focused on the development of a hydrogen absorbing Zr 2Fe layer in the outer shell of high pressure (70 MPa) hydrogen storage tanks. This layer aims to absorb hydrogen coming from micro-cracks, as those formed by hydrogen embrittlement of the aluminium liner. A multi-phased Zr 2Fe allo...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2005-11, Vol.123 (3), p.187-193
Main Authors: Janot, R., Latroche, M., Percheron-Guégan, A.
Format: Article
Language:English
Subjects:
Hydrogen gettering
Induction melting
Intermetallics
Melt-spinning
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Summary:This study is focused on the development of a hydrogen absorbing Zr 2Fe layer in the outer shell of high pressure (70 MPa) hydrogen storage tanks. This layer aims to absorb hydrogen coming from micro-cracks, as those formed by hydrogen embrittlement of the aluminium liner. A multi-phased Zr 2Fe alloy prepared by induction melting presents a very fast absorption kinetic and a maximum absorption capacity of about 1.8 wt.%. The volume expansion upon hydrogen absorption reaches 19% and is very anisotropic. The good resistance to contamination of the Zr 2Fe alloy is also demonstrated, since the absorption kinetic remains very fast after heating in air at 150 °C with the carbon fiber-epoxy resin composite used for the reinforcement of the high pressure storage vessel. Moreover, Zr 2Fe ribbons can be prepared by melt-spinning. An annealing treatment above the recrystallization temperature of the amorphous phase (around 410 °C) is needed to obtain hydrogen absorption rate similar to that of induction-melted Zr 2Fe alloy. However, the annealing leads to the limitation of the hydrogen capacity to 1.2 wt.%, due to the occurrence of an absorption–disproportionation phenomenon.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2005.07.016