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Comparative evaluation of Mg-Ni hydrogen absorbing materials prepared by mechanical alloying

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cris.author.scopus-author-id49962649800
cris.author.scopus-author-id7006215828
cris.author.scopus-author-id6701680056
cris.author.scopus-author-id57202480067
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid0000-0003-1946-4449
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.department#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.departmentIndian Institute of Technology, Madras
cris.virtual.department#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.department#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid75e4540b-a494-49a2-b35c-b1625f1d73c6
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
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cris.virtualsource.department75e4540b-a494-49a2-b35c-b1625f1d73c6
cris.virtualsource.department#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.department#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.contributor.authorVijay, R.
dc.contributor.authorSundaresan, R.
dc.contributor.authorPrakash M Maiya
dc.contributor.authorMurthy, S. Srinivasa
dc.date.accessioned2023-09-20T05:44:00Z
dc.date.available2023-09-20T05:44:00Z
dc.date.issued01-04-2005
dc.description.abstractIntermetallic Mg2Ni-based alloys of different compositions, namely stoichiometric (Mg2Ni), superstoichiometric (60 wt%Mg) and substoichiometric (40 wt% Mg), were synthesised by mechanical alloying in a high-energy planetary ball mill. While the latter two were wet milled, the former was prepared by both wet and dry milling. The alloyed powders were characterised for particle size by laser diffraction and phase content by XRD. Thermal annealing preceded by 12 h of dry milling was found to accomplish the complete formation of Mg2Ni phase. Dry milling is found to be better in terms of milling time and purity of the alloy formed. The lower the Mg content, the faster is the formation of Mg2Ni phase. Pressure composition isotherms revealed the presence of hysterisis. The plateau pressure increased with increase in Ni content at 250°C and 300°C. The maximum absorption of hydrogen was close to the theoretical limit at all temperatures in stoichiometric and superstoichiometric compositions (∼94% and ∼90%, respectively). However, the substoichiometric composition absorbed considerably less than its theoretical limit (∼84%). The absorbed and desorbed quantities were similar in the given timeframe at the temperatures 330°C and 300°C, with the superstoichiometric composition showing the highest value. The absorbed quantity and absorption rate at 250°C were comparable for all the compositions to the values at the higher temperatures, but the desorption capacity was poorer, with Mg2Ni showing the highest value. © 2004 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ijhydene.2004.04.019
dc.identifier.issn3603199
dc.identifier.scopus2-s2.0-13544264401
dc.identifier.urihttps://apicris.irins.org/handle/IITM2023/54251
dc.relation.ispartofseriesInternational Journal of Hydrogen Energy
dc.sourceInternational Journal of Hydrogen Energy
dc.subjectHydrogen absorption
dc.subjectHydrogen desorption
dc.subjectHydrogen storage
dc.subjectKinetics
dc.subjectMechanical alloying
dc.subjectPressure-composition isotherms
dc.titleComparative evaluation of Mg-Ni hydrogen absorbing materials prepared by mechanical alloying
dc.typeJournal
dspace.entity.typePublication
oaire.citation.endPage508
oaire.citation.issue5
oaire.citation.startPage501
oaire.citation.volume30
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliationIndian Institute of Technology, Madras
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
person.affiliation.cityHyderabad
person.affiliation.cityChennai
person.affiliation.id60076056
person.affiliation.id60025757
person.affiliation.nameInternational Advanced Research Centre for Powder Metallurgy and New Materials, Hyderabad
person.affiliation.nameIndian Institute of Technology Madras
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