A model for lamellar eutectic solidification

Pandey, L. ; Ramachandrarao, P. (1987) A model for lamellar eutectic solidification Acta Metallurgica, 35 (10). pp. 2549-2556. ISSN 0001-6160

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/000161...

Related URL: http://dx.doi.org/10.1016/0001-6160(87)90152-0


Interface shape and interface solute concentrations have been obtained for lamellar eutectic solidification on the assumption that the latter is proportional to the deviation of the interface from a plane front. It has been shown that the well known constancy of λ2R and ΔTλ in lamellar eutectics is a consequence of conservation of solute during steady state growth and the need to maintain force balance at the triple points on the interface. The model is applied to the Al-CuAl2 eutectic system and the magnitudes of the Gibbs-Thompson coefficients for the two phases are found. These and the interfacial angles are shown to be in good agreement with experiment.

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