INVESTIGADORES
FUSTER Valeria De Los Angeles
artículos
Título:
MgH2 synthesis during reactive mechanical alloying studied by in-situ pressure monitoring
Autor/es:
FACUNDO J. CASTRO; VALERIA FUSTER; GUILLERMINA URRETAVIZCAYA
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 37 p. 16844 - 16851
ISSN:
0360-3199
Resumen:
The synthesis of MgH2 by reactive mechanicalmilling has been studied by monitoring H2 pressure changes inside amilling chamber. Mg and a Mg-10 wt.% C mixture were used as starting materialsand milled under 0.5 MPa of H2. The addition of C doubles the MgH2synthesis efficiency due to C acting as a process control agent. MgH2formation has been observed throughout milling and during the rest periodsbetween milling stages. Mg hydriding during the rest periods has been found tobe controlled by hydrogen diffusion through MgH2. High-diffusivitypaths along grain boundaries seem to be operative during the process. A lowerbound for the diffusion coefficient of H in MgH2 at room temperatureof 10-25 m2 s-1 has been estimated from thedata.
