During directional solidification of thin layers (50 μm) of the transparent CBr 4 -C 2 Cl 6 lamellar eutectic alloy, we observed tilt waves, a type of instability consisting in small domains of tilted lamellae moving transversely along the growth front. This instability is a way the system adjusts its wavelength after a small perturbation, without creating or destroying lamellae.
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Faivre et al. (1989) studied this question.
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