Atomic-size effect on the microstructural properties of Ni2FeGa

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DOIResolve DOI: http://doi.org/10.1016/j.actamat.2010.10.057
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TypeArticle
Journal titleActa Materialia
ISSN1359-6454
Volume59
Issue3
Pages12491258; # of pages: 10
SubjectHeusler alloys; Order-disorder phenomena; Structural modulations; Transmission electron; Atoms; Ferromagnetic materials; Gallium alloys; Iron alloys; Melt spinning; Transmission electron microscopy; Spinodal decomposition
AbstractThe microstructural properties of melt-spun ribbon of the ferromagnetic shape-memory Heusler alloy Ni2FeGa have been investigated by transmission electron microscopy. Two kinds of micromodulated structures, Fe-rich and Ga-rich, have been established. The Fe-rich micromodulated structure is formed by Fe atoms partially replacing Ga atoms on {3 5 0} planes in the L2(1) structure. The Ga-rich micromodulated structure concerns Ga atoms partially replacing Fe atoms on {3 + n, 5 + n, 0}(n ≥ 0) planes. The Fe-rich and Ga-rich micromodulated structures originate from spinodal decomposition of the Fe and Ga compositions, which is closely related to the difference of atomic sizes of Ni, Fe and Ga.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21271912
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Record identifier209c680d-00ae-4343-8449-5cebc218ed2a
Record created2014-05-05
Record modified2016-05-09
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