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Effect of Carbon Addition on Hydrogen Storage Performances of Magnesium-based Alloys: from Bulk Powders to Thin Films

Published online by Cambridge University Press:  15 February 2011

A. Rougier
Affiliation:
LRCS, 33 rue St. Leu, 80039 Amiens, France.
X. Darok
Affiliation:
LRCS, 33 rue St. Leu, 80039 Amiens, France.
V.V. Bhat
Affiliation:
LRCS, 33 rue St. Leu, 80039 Amiens, France.
L. Aymard
Affiliation:
LRCS, 33 rue St. Leu, 80039 Amiens, France.
G.A. Nazri
Affiliation:
General Motors R&D, Warren Michigan, USA.
J.-M. Tarascon
Affiliation:
LRCS, 33 rue St. Leu, 80039 Amiens, France.
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Abstract

Mg-based thin films were successfully grown by Pulsed Laser Deposition. Dramatic optical changes were observed depending on the conditions of deposition. Films grown in vacuum were shiny metallic whereas the ones grown in a Ar/H2 gas mixture were highly transparent. Ex situ hydrogenation, by annealing the films at 200 °C in 15 bars of hydrogen, led to similar metallictransparent transformation. Mg-Cx (x ≤ 20 %) films show a faster hydrogenation associated with a significant decrease in oxygen content by carbon addition.

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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