Aramanda, SK and Khanna, S and Salapaka, SK and Chattopadhyay, K and Choudhury, A (2020) Crystallographic and Morphological Evidence of Solid�Solid Interfacial Energy Anisotropy in the Sn-Zn Eutectic System. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science .
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Abstract
In this paper, we explore the morphological evolution during two-phase growth in the Sn-Zn eutectic system, which has a particularly low volume fraction of the minority Zn phase. The reason for this choice is its exotic nature, as even with such a low volume fraction, the reported morphology is �broken-lamellar,� in contrast to the usually expected hexagonal arrangement of Zn rods in the Sn matrix. Thus, the main objective of the study is to investigate the reasons behind this phenomenon. We begin by presenting experimental results detailing the morphology and crystallography of the eutectic microstructures under various combinations of thermal gradients and velocities in directional solidification conditions. Based on the crystallography and further specially designed experiments we find that the solid�solid interface between the Sn and Zn crystal is anisotropic. On the basis of the results, we propose a hypothesis that the presence of solid�solid interfacial energy anisotropy leads to the formation of predominantly broken-lamellar structures, even when the minority fraction is significantly low. © 2020, The Minerals, Metals & Materials Society and ASM International.
| Item Type: | Journal Article |
|---|---|
| Publication: | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Publisher: | Springer |
| Additional Information: | copyright to this article belongs to Springer |
| Keywords: | Anisotropy; Binary alloys; Eutectics; Interfacial energy; Lamellar structures; Morphology; Solidification; Tin; Tin alloys; Volume fraction; Zinc; Zinc alloys, Designed experiments; Eutectic microstructure; Eutectic system; Hexagonal arrangements; Interfacial energy anisotropies; Morphological evolution; Solid interfaces; Two phase, Crystallography |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 11 Dec 2020 06:13 |
| Last Modified: | 11 Dec 2020 06:13 |
| URI: | http://eprints.iisc.ac.in/id/eprint/66850 |
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