Effect of amorphous Mg50Ni50 on hydriding and dehydriding behavior of Mg2Ni alloy

D. Guzmán; S. Ordoñez; J. F. Fernández; C. Sánchez; D. Serafini; P. A. Rojas; C. Aguilar; P. Tapia

doi:10.1016/j.matchar.2011.02.007

Effect of amorphous Mg₅₀Ni₅₀ on hydriding and dehydriding behavior of Mg₂Ni alloy

D. Guzmán, S. Ordoñez, J. F. Fernández, C. Sánchez, D. Serafini, P. A. Rojas, C. Aguilar, P. Tapia

Universidad Adolfo Ibáñez

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Composite Mg₂Ni (25 wt.%) amorphous Mg₅₀Ni ₅₀ was prepared by mechanical milling starting with nanocrystalline Mg₂Ni and amorphous Mg₅₀Ni₅₀ powders, by using a SPEX 8000 D mill. The morphological and microstructural characterization of the powders was performed via scanning electron microscopy and X-ray diffraction. The hydriding characterization of the composite was performed via a solid gas reaction method in a Sievert's-type apparatus at 363 K under an initial hydrogen pressure of 2 MPa. The dehydriding behavior was studied by differential thermogravimetry. On the basis of the results, it is possible to conclude that amorphous Mg₅₀Ni₅₀ improved the hydriding and dehydriding kinetics of Mg₂Ni alloy upon cycling. A tentative rationalization of experimental observations is proposed.

Original language	English
Pages (from-to)	442-450
Number of pages	9
Journal	Materials Characterization
Volume	62
Issue number	4
DOIs	https://doi.org/10.1016/j.matchar.2011.02.007
State	Published - Apr 2011

Keywords

Amorphous materials
Hydriding and dehydriding processes
Hydrogen storage materials
Mechanical alloying
X-ray diffraction

Access to Document

10.1016/j.matchar.2011.02.007

Cite this

@article{3bc6516b3c0043639f762cb3072db773,

title = "Effect of amorphous Mg50Ni50 on hydriding and dehydriding behavior of Mg2Ni alloy",

abstract = "Composite Mg2Ni (25 wt.%) amorphous Mg50Ni 50 was prepared by mechanical milling starting with nanocrystalline Mg2Ni and amorphous Mg50Ni50 powders, by using a SPEX 8000 D mill. The morphological and microstructural characterization of the powders was performed via scanning electron microscopy and X-ray diffraction. The hydriding characterization of the composite was performed via a solid gas reaction method in a Sievert's-type apparatus at 363 K under an initial hydrogen pressure of 2 MPa. The dehydriding behavior was studied by differential thermogravimetry. On the basis of the results, it is possible to conclude that amorphous Mg50Ni50 improved the hydriding and dehydriding kinetics of Mg2Ni alloy upon cycling. A tentative rationalization of experimental observations is proposed.",

keywords = "Amorphous materials, Hydriding and dehydriding processes, Hydrogen storage materials, Mechanical alloying, X-ray diffraction",

author = "D. Guzm{\'a}n and S. Ordo{\~n}ez and Fern{\'a}ndez, {J. F.} and C. S{\'a}nchez and D. Serafini and Rojas, {P. A.} and C. Aguilar and P. Tapia",

note = "Funding Information: The authors gratefully acknowledge “ Fondo Nacional Desarrollo Cient{\'i}fico y Tecnol{\'o}gico de Chile ”, FONDECYT, proyect No. 1070085 and “ Comisi{\'o}n Nacional de Investigaci{\'o}n Cient{\'i}fica y Tecnol{\'o}gica de Chile ”, CONICYT, for their economic support granted to realize this work. Some authors thank the Spanish Ministry of Education and Science , MEC, for its financial support under contract No. MAT2008-06547-C02-01 .",

year = "2011",

month = apr,

doi = "10.1016/j.matchar.2011.02.007",

language = "English",

volume = "62",

pages = "442--450",

journal = "Materials Characterization",

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TY - JOUR

T1 - Effect of amorphous Mg50Ni50 on hydriding and dehydriding behavior of Mg2Ni alloy

AU - Guzmán, D.

AU - Ordoñez, S.

AU - Fernández, J. F.

AU - Sánchez, C.

AU - Serafini, D.

AU - Rojas, P. A.

AU - Aguilar, C.

AU - Tapia, P.

N1 - Funding Information: The authors gratefully acknowledge “ Fondo Nacional Desarrollo Científico y Tecnológico de Chile ”, FONDECYT, proyect No. 1070085 and “ Comisión Nacional de Investigación Científica y Tecnológica de Chile ”, CONICYT, for their economic support granted to realize this work. Some authors thank the Spanish Ministry of Education and Science , MEC, for its financial support under contract No. MAT2008-06547-C02-01 .

PY - 2011/4

Y1 - 2011/4

N2 - Composite Mg2Ni (25 wt.%) amorphous Mg50Ni 50 was prepared by mechanical milling starting with nanocrystalline Mg2Ni and amorphous Mg50Ni50 powders, by using a SPEX 8000 D mill. The morphological and microstructural characterization of the powders was performed via scanning electron microscopy and X-ray diffraction. The hydriding characterization of the composite was performed via a solid gas reaction method in a Sievert's-type apparatus at 363 K under an initial hydrogen pressure of 2 MPa. The dehydriding behavior was studied by differential thermogravimetry. On the basis of the results, it is possible to conclude that amorphous Mg50Ni50 improved the hydriding and dehydriding kinetics of Mg2Ni alloy upon cycling. A tentative rationalization of experimental observations is proposed.

AB - Composite Mg2Ni (25 wt.%) amorphous Mg50Ni 50 was prepared by mechanical milling starting with nanocrystalline Mg2Ni and amorphous Mg50Ni50 powders, by using a SPEX 8000 D mill. The morphological and microstructural characterization of the powders was performed via scanning electron microscopy and X-ray diffraction. The hydriding characterization of the composite was performed via a solid gas reaction method in a Sievert's-type apparatus at 363 K under an initial hydrogen pressure of 2 MPa. The dehydriding behavior was studied by differential thermogravimetry. On the basis of the results, it is possible to conclude that amorphous Mg50Ni50 improved the hydriding and dehydriding kinetics of Mg2Ni alloy upon cycling. A tentative rationalization of experimental observations is proposed.

KW - Amorphous materials

KW - Hydriding and dehydriding processes

KW - Hydrogen storage materials

KW - Mechanical alloying

KW - X-ray diffraction

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