Pinning/depinning dynamics of trijunction lines during faceted/nonfaceted eutectic growth

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dc.contributor.authorMohagheghi, S.
dc.contributor.authorŞerefoğlu, M.
dc.contributor.authorAkamatsu, S.
dc.contributor.authorBottin-Rousseau, S.
dc.date.accessioned2024-05-19T14:33:14Z
dc.date.available2024-05-19T14:33:14Z
dc.date.issued2024
dc.departmentİstinye Üniversitesien_US
dc.description.abstractWe present an in situ experimental study of decoupled- and coupled-growth patterns in a binary faceted/ nonfaceted (f/nf) eutectic alloy. Real-time optical observation is carried out at low growth velocity V (<0.3?ms?1) during directional solidification of the transparent AminoMethylPropaneDiol-Succinonitrile (AMPD-SCN) eutectic in thin samples. On a large scale, the two-phase growth front mostly exhibits irregularly spaced decoupled-growth patterns involving faceted fiber-like AMPD crystals that protrude in the liquid ahead of, and in weak diffusive interaction with the nonfaceted SCN solid. The morphological stability of low-velocity, steady-state decoupled-growth patterns is evidenced. In addition, three types of (f/nf) coupled-growth patterns with fiber-like, tubular (or “hollow”) and C-shaped morphologies, respectively, are identified. New light is cast on the pinning/depinning dynamics of trijunctions at which the two solid phases and the liquid meet in equilibrium. A discussion is initiated on the interplay between the interfacial kinetics of the more or less mobile facets and the solute diffusion field, and on the stability of triple junctions with strongly anisotropic interfaces. © 2024 Elsevier B.V.en_US
dc.description.sponsorshipTürkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK: 217M089; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK; Campus France: PHC BOSPHORUS 39706RE; Campus Franceen_US
dc.description.sponsorshipWe gratefully acknowledge Maria Achache for technical help. This work was funded by the bilateral program between TUBITAK (Grant No. 217M089) and Campus France (PHC BOSPHORUS 39706RE).en_US
dc.identifier.doi10.1016/j.jcrysgro.2024.127705
dc.identifier.issn0022-0248
dc.identifier.scopus2-s2.0-85190871213en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1016/j.jcrysgro.2024.127705
dc.identifier.urihttps://hdl.handle.net/20.500.12713/4153
dc.identifier.volume636en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofJournal of Crystal Growthen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmz20240519_kaen_US
dc.subjectA1.Directional Solidificationen_US
dc.subjectA1.Eutecticsen_US
dc.subjectA1.Interfacesen_US
dc.subjectA1.Morphological Stabilityen_US
dc.titlePinning/depinning dynamics of trijunction lines during faceted/nonfaceted eutectic growthen_US
dc.typeArticleen_US

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