Hydrogen transition element additives (Ti,V) during ball milling of magnesium hydride

Hydrogen transition element additives (Ti,V) during ball milling of magnesium hydride

It has been revealed that ball-milling of MgH2 powders with small amounts of selected 3d-transition metalsMsuch as Ti, Nb,... or oxides of 3d-metals (e.g. Cr2O3) leads to marked improvements of the hydrogen absorption/desorption kinetics. We have undertaken systematic co-milling processes under argo...

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Veröffentlicht in:Journal of alloys and compounds 2004-04, Vol.383, p.205-208
Hauptverfasser: Charbonnier, Jean, de Rango, Patricia, Fruchart, Daniel, Miraglia, Salvatore, Pontonnier, L., Rivoirard, Sophie, Skryabina, N., Vuillet, Philippe
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Condensed Matter
Materials Science
Physics
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container_end_page 208
container_issue
container_start_page 205
container_title Journal of alloys and compounds
container_volume 383
creator Charbonnier, Jean
de Rango, Patricia
Fruchart, Daniel
Miraglia, Salvatore
Pontonnier, L.
Rivoirard, Sophie
Skryabina, N.
Vuillet, Philippe
description It has been revealed that ball-milling of MgH2 powders with small amounts of selected 3d-transition metalsMsuch as Ti, Nb,... or oxides of 3d-metals (e.g. Cr2O3) leads to marked improvements of the hydrogen absorption/desorption kinetics. We have undertaken systematic co-milling processes under argon atmosphere of MgH2 powders added with small amounts of Ti, V and Nb by using a planetary machine. The resulting products were analysed by using XRD, SEM and hydrogen absorption techniques. Different milling times were applied and both the resulting particle size and the degree of crystalline/amorphous state were estimated. During the intensive milling, we have pointed out the formation of transition metal hydrides MHx as an effect of mechanical alloying. The main results are discussed regarding the nature of the d-metal additions and the co-milling time procedure.
doi_str_mv 10.1016/j.jallcom.2004.04.059
format Article
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Materials Science
Physics
title Hydrogen transition element additives (Ti,V) during ball milling of magnesium hydride
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