SELFCONSISTENT SOLUTIONS FOR LAMELLAR EUTECTIC GROWTH

The boundary element method is used to solve the diffusion problem for lamellar eutectic growth for a curved solid-liquid interface and to c alculate the dependence of undercooling on spacing in the Pb-Sn, Al-Al 2Cu and CBr4-C2Cl6 eutectic systems for a range of growth velocities. The analysis predicts an upper bound to the spacing that is not predic ted by the original Jackson and Hunt (JH) analysis. The spacing range for steady state growth predicted by the present analysis shows good a greement with the experimentally measured range in the three systems. Experimentally measured undercoolings are shown to lie between the und ercoolings predicted for the extremum spacing and the maximum selfcons istent spacing obtained in the present analysis.