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Development of SEM Metallography for the Study of the Mg-MgH2 Phase Transformation

Published online by Cambridge University Press:  01 February 2011

Marco Vittori Antisari ,
Amelia Montone ,
Nadica Abazovic ,
Annalisa Aurora ,
Milica Drvendzija ,
Rita Mancini ,
Daniele Mirabile Gattia  and
Luciano Pilloni
Marco Vittori Antisari
Affiliation:
vittori@casaccia.enea.it, ENEA C.R. Casaccia, Materials and Technology - Composite and Nanostructured Materials Section, Via Anguillarese, 301, Rome, 00061, Italy
Amelia Montone
Affiliation:
montone@casaccia.enea.it, C.R. ENEA Casaccia, Materials and Tecnology, Rome, 00061, Italy
Nadica Abazovic
Affiliation:
kiki@vin.bg.ac.yu, Vinca Institute of Nuclear Sciences, Laboratory of Radiation chemistry and physics, Belgrade, 11000, Yugoslavia
Annalisa Aurora
Affiliation:
annalisa.aurora@casaccia.enea.it, C.R. ENEA Casaccia, Materials and Tecnology, Rome, 00061, Italy
Milica Drvendzija
Affiliation:
milicad@vin.bg.ac.yu, Vinca Institute of Nuclear Sciences, Laboratory of Materials Sciences, Belgrade, 11000, Yugoslavia
Rita Mancini
Affiliation:
rita.mancini@casaccia.enea.it, C.R. ENEA Casaccia, Materials and Technology, Rome, 00061, Italy
Daniele Mirabile Gattia
Affiliation:
daniele.mirabile@casaccia.enea.it, C.R. ENEA Casaccia, Materials and Technology, Rome, 00061, Italy
Luciano Pilloni
Affiliation:
luciano.pilloni@casaccia.enea.it, C.R. ENEA Casaccia, Materials and Technology, Rome, 00061, Italy
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Abstract

The study of sorption reactions of metal hydrides is the subject of numerous researches in connection with the development of a safe technology for hydrogen storage, and MgH2, in particular, is one of the most promising materials. Several efforts have been already carried out in order to understand the kinetic mechanisms involved in the MgH2 decomposition which is at the basis of H2 release. However, the role of additives and induced structural defects on the sorption cycles is not clear yet. With the purpose of supporting the reaction analysis we have developed an experimental protocol for the metallographic examination at high spatial resolution of partially desorbed MgH2 powders. In particular, this procedure allows cross-sectional analysis of powders embedded into conductive matrix, while the observation method produces a different contrast among metallic Mg, MgH2 and additive particles made of heavier materials.

Keywords

Mgabsorptionscanning electron microscopy (SEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1042: Symposium S – Materials and Technology for Hydrogen Storage , 2007 , 1042-S03-22
Copyright
Copyright © Materials Research Society 2008

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