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dc.contributor.author
Erika, Teliz
dc.contributor.author
Faccio Sgiorovello, Ricardo Juan
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dc.contributor.author
Ruiz, Fabricio Carlos
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dc.contributor.author
Fernando, Zinola
dc.contributor.author
Verónica, Díaz
dc.date.available
2018-06-26T20:31:09Z
dc.date.issued
2015-07
dc.identifier.citation
Erika, Teliz; Faccio Sgiorovello, Ricardo Juan; Ruiz, Fabricio Carlos; Fernando, Zinola; Verónica, Díaz; Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys; Elsevier Science Sa; Journal of Alloys and Compounds; 649; 7-2015; 267-274
dc.identifier.issn
0925-8388
dc.identifier.uri
http://hdl.handle.net/11336/50156
dc.description.abstract
The effects of partial replacement of chromium by molybdenum was studied on the structure and electrochemical kinetic properties of ZrCr1-xNiMox(x = 0.0, 0.3 and 0.6) metal hydride alloys. The arc-melting prepared alloys were metallurgically characterized by X-ray diffraction and energy dispersive spectroscopy microanalysis, which showed AB2 (with hexagonal C14 structure) and ZrxNiy (Zr7Ni10, Zr9Ni11) phases. After a partial substitution of chromium by molybdenum, secondary phases monotonically increase with the C14 unit cell volume indicating that most of molybdenum atoms locate in the B-site. The alloys were electrochemically characterized using charge/discharge cycling, electrochemical impedance spectroscopy and rate capability experiments that allowed the determination of hydriding reaction kinetic parameters. The presence of molybdenum produces a positive effect for hydrogen diffusion in the alloy lattice, and ZrCr0.7NiMo0.3 alloy depicts the better kinetics associated with a fast activation, lower charge transfer resistance and the best high rate discharge behavior. This fact would be related to a lower diffusion time constant and a bigger value of the product between exchange density current and surface active area. There is a trade-off in the amounts of secondary phase and Laves phases in order to improve the kinetic performance.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Hydrogen
dc.subject
Laves Phase
dc.subject
Metal Hydrides
dc.subject
Molybdenum
dc.subject.classification
Otras Ciencias Químicas
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Electrochemical and metallurgical characterization of ZrCr1-xNiMox AB2 metal hydride alloys
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-26T13:42:39Z
dc.journal.volume
649
dc.journal.pagination
267-274
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Erika, Teliz. Universidad de la República; Uruguay
dc.description.fil
Fil: Faccio Sgiorovello, Ricardo Juan. Universidad de la República; Uruguay
dc.description.fil
Fil: Ruiz, Fabricio Carlos. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Fernando, Zinola. Universidad de la República; Uruguay
dc.description.fil
Fil: Verónica, Díaz. Universidad de la República; Uruguay
dc.journal.title
Journal of Alloys and Compounds
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jallcom.2015.07.206
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925838815306034
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