Diffusion-induced abnormal tertiary dendrite during peritectic solidification in a temperature gradient

摘要

1.Introduction Dendritic structure are commonly encountered during solidification[1-4],especially in systems freezing with relatively low entropies of transformation[1,5].Generally speaking,the dendritic structure is composed of primary dendrite stem,secondary branch and even tertiary and higher order dendrite arms[1].Different kinds of models have been proposed for describing the growth of primary dendrite[1-5]and secondary dendrite arms[1,6,7].