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dc.contributor.authorPitt, MP
dc.contributor.authorGray, EM
dc.contributor.authorHunter, BA
dc.date.accessioned2017-05-03T11:32:46Z
dc.date.available2017-05-03T11:32:46Z
dc.date.issued2002
dc.date.modified2009-09-17T07:24:13Z
dc.identifier.issn0925-8388
dc.identifier.doi10.1016/S0925-8388(01)01670-X
dc.identifier.urihttp://hdl.handle.net/10072/6963
dc.description.abstractDuring the first few hydrogenation-dehydrogenation cycles of virgin LaNi5, the absorption plateau pressure drops sharply, accompanied by powdering of the starting intermetallic. We looked for an explanation of this phenomenon in the microstructural features of the metal that can be studied via diffraction. Five complete absorption-desorption cycles were conducted in an unbroken sequence, with neutron powder diffraction patterns being recorded in cycles 1, 2 and 5. We found that, after activation, the drop in absorption plateau pressure correlates with increasing coherency of the phase transformation in the c-direction, translating to lower elastic strain energy associated with the transformation. The total microstrain in the dehydrided metal is essentially constant after cycle 1. These findings afford a partial understanding of the pressure behaviour in the first few cycles, but the mechanism by which the lattice coherency develops remains to be explained.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier Science
dc.publisher.placeNetherlands
dc.publisher.urihttp://www.elsevier.com/wps/find/journaldescription.cws_home/522468/description#description
dc.relation.ispartofpagefrom241
dc.relation.ispartofpageto245
dc.relation.ispartofjournalJournal of Alloys and Compounds
dc.relation.ispartofvolume330-332
dc.subject.fieldofresearchCondensed Matter Physics
dc.subject.fieldofresearchMaterials Engineering
dc.subject.fieldofresearchResources Engineering and Extractive Metallurgy
dc.subject.fieldofresearchcode0204
dc.subject.fieldofresearchcode0912
dc.subject.fieldofresearchcode0914
dc.titleEvolution of microstructure in the LaNi5-D system during the early absorption-desorption cycles
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.date.issued2002
gro.hasfulltextNo Full Text
gro.griffith.authorGray, Evan M.
gro.griffith.authorPitt, Mark P.


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