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Microstructural modification upon hydrogen cycling of MgH2 nanocomposites

Published online by Cambridge University Press:  25 October 2011

A. Montone ,
A. Aurora ,
D. Mirabile Gattia  and
M. Vittori Antisari
A. Montone
Affiliation:
ENEA, Technical Unit “Materials Technology”, Research Center of Casaccia, Via Anguillarese 301, Rome, 00123, Italy
A. Aurora
Affiliation:
ENEA, Technical Unit “Materials Technology”, Research Center of Casaccia, Via Anguillarese 301, Rome, 00123, Italy
D. Mirabile Gattia
Affiliation:
ENEA, Technical Unit “Materials Technology”, Research Center of Casaccia, Via Anguillarese 301, Rome, 00123, Italy
M. Vittori Antisari
Affiliation:
ENEA, Technical Unit “Materials Technology”, Research Center of Casaccia, Via Anguillarese 301, Rome, 00123, Italy
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Abstract

The morphological evolution of Mg based powders during repeated absorption-desorption reactions with hydrogen has been studied by Scanning Electron Microscopy. The main feature observed is the presence, after several cycles, of surface protrusions probably constituted by the base Mg material without the presence of a catalyst. The effect is present both in catalyzed and non-catalyzed materials and it is considered an indication of the tendency of the base material to exit from the oxide shell surrounding the Mg powder particles. This tendency is confirmed by the observation of empty MgO boxes indicating that the effect can push until a complete expulsion of the base material. This effect can represent the base for an innovative method for cleaning the surface of a tank material by an “in situ” procedure.

Keywords

Mgscanning electron microscopy (SEM)morphology
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1334: Symposium N – Recent Developments in Materials for Hydrogen Storage and Carbon-Capture Technologies , 2011 , mrss11-1334-n03-10
Copyright
Copyright © Materials Research Society 2011

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References

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