Stability of lamellar eutectic growth

Parisi, Andrea and Plapp, Mathis (2008) Stability of lamellar eutectic growth. Acta Materialia, 56 (6). pp. 1348-1357. ISSN 1359-6454

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The morphological stability of lamellar eutectic coupled growth is investigated by means of quantitative three-dimensional phase-field simulations, both for a generic eutectic alloy with a symmetric phase diagram and for the transparent organic alloy carbontetrabromide-hexachloroethane. The instabilities that limit stable steady-state growth at large spacings are identified and compared to the instabilities known in thin samples. For all alloys and compositions investigated, the first instability to occur is a zigzag instability, which can saturate or lead to the breakup of the lamellae into rods or labyrinth structures, depending on the initial spacing and the volume fractions. The simulation results are in good agreement with recent experimental observations.

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Journal Article
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Acta Materialia
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27 Apr 2018 09:20
Last Modified:
22 Nov 2022 05:43