Revised form of Jackson-Hunt theory: application to directional solidification of MnBi/Bi eutectics

A generalized eutectic theory, which defaults to the prior theories by Jack son-Hunt and Trivedi et al. under their boundary conditions, has been devel oped to consider phase relations, solidification temperature and interface velocity over the entire parametric range, and for both lamellar and rod eu tectic morphologies. The analytical solution reveals that lambda(2)V and la mbda Delta T, though varying with the Peclet number, are virtually constant at very low Peclet number (crystal growth conditions). These constant valu es, however, map vary with the phase reaction and the degree of undercoolin g. (C) 2000 Elsevier Science B.V. AII rights reserved.