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dc.contributor.authorBecker, Hanka
dc.contributor.authorBergh, Tina
dc.contributor.authorVullum, Per Erik
dc.contributor.authorLeineweber, Andreas
dc.contributor.authorLi, Yanjun
dc.identifier.citationJournal of Alloys and Compounds. 2019, 780 917-929.nb_NO
dc.description.abstractCrystal structure characteristics of coexisting β and δ phase were investigated in a purely intermetallic Al-Fe-Si alloy and in plate-shaped intermetallic particles formed in a model secondary Al7.1Si1.2Fe0.3Mn alloy. The β- and the δ-Al-Fe-Si intermetallic phase are thermodynamic and crystallographic distinct phases despite some structural similarities. Nevertheless, both phases can appear severely intergrown within single plate-shaped particles after solidification of Fe-containing secondary Al-Si alloys under non-equilibrium conditions which is attributed to the good fit along the (001) planes of both phases. Thereby, few layers of the δ-like stacking sequences within the β phase can be considered as a typical planar defect of the β phase. The β phase exhibits polytype structures for which structural models have been formulated based on ordering of the constituting double layers being shifted by a/2 or b/2 displacements leading to 4 different double layer positions A, B, C, and D. An AB polytype with idealized Acam symmetry actually shows a monoclinic distortion towards A12/a1 symmetry. An ABCD polytype with idealized I41/acd symmetry has been derived, too. Next to the ordered polytypes, stackings with non-periodic sequences of A, B, C and D double layers exist.nb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleβ- and δ-Al-Fe-Si intermetallic phase, their intergrowth and polytype formationnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalJournal of Alloys and Compoundsnb_NO
dc.relation.projectNorges forskningsråd: 197405nb_NO
dc.relation.projectNorges forskningsråd: 237900nb_NO
dc.description.localcode© 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 1.12.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
cristin.unitnameInstitutt for materialteknologi
cristin.unitnameInstitutt for fysikk

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Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal