| Title |
The Morphological Development and It Stability of the Planar Solid - Liquid Interface in Dilute sn - Sb alloys |
| Authors |
박준규(Jun Kyu Park); 한정호(Jung Ho Han); 이동희(Dong Hi Lee) |
| Abstract |
An analysis on the morphological development in the planar solid-liquid interface of dilute Sn-Sb alloys has been investigated by means of the directional solidification process with the help of a novel “Pettier Interface Demarcation” method for the recording of the instantaneous interracial morphology during solidification cycle. The transition from planar to cellular interface under the condition of corresponding change of G_L and V was agreed generally with constitutional supercooling criterion but it was deviated slightly from the CS criterion as the growth velocity was increased. The perturbed solid-liquid interface in its initiation stage was analyzed to preserve the planar interface in accordance with the CS and Mullins Sekerka`s criterion for the stability of the planar solid-liquid interface. Although the solid-liquid inter face in polycrystalline growth was statisfied macroscopically with a planar shape, the microscopic difference in the growth velocity of each grain resulted from some effects due to the slight difference in cry stallographic orientation and the grain boundary energies of each grain. |