Convective and interfacial instabilities during unidirectional solidification of a binary alloy

The effect of convection on disorder in primary cellular and dendritic arrays

“…[22,23,24] In to 44.0 m/s. contrast, in the Al-Cu system, the rejected solute at the Different velocities were examined for each alloy system, interface is heavier and will give rise to a negative density as shown in Table I, and these velocities were selected to gradient in the liquid at the interface, which will result in obtain both cellular and dendritic arrays and to examine the no fluid motion in the absence of other destabilizing forces.…”

Flow-induced changes of the morphological stability in directional solidification: localized morphologies

“…The influence of buoyancy-driven convective instability competing with morphological instability is discussed e.g. in [4), [12), [13), [18) or in [5). Unstable (stable) density stratifications are possible due to solutal expansion if the lighter (heavier) component is rejected.…”

Pattern selection in single-component systems coupling Bénard convection and solidification

“…1982), Hurle & Jakeman ( 1981), Marshall ( 1981)) fundamental uncertainties exist in the prediction of the progress and the shape of the freezing or melting front. The growth of crystals from binary solutions is a process where the interaction of adverse temperature and concentration gradients may generate unwanted interfacial instabilities during a unidirectional solidification (Mullins & Sekerka ( 1964), Coriell et al( 1980), Coriell and Sekerka ( 1982), Hurle & Jakeman (1983)). These instabilities generally deform the i ni tially planar sol id-1 iquid i nterface a nd 1 ead to a c ell ular pattern of micro-segregation.…”