Sunagawa (1981, 1987) has summarized earl- ier work. ![]() A crystal growth mechanism based on this asymmetrization is proposed, which should be of general validity. Other investigators have sought an understanding of dendrites in the molecular mechanism of crystal growth. The effect of this asymmetrization on the growth of α-SiC is considered. More subtle effects introduced by the complex dendritic microstructure in solidified materials include crystallographic texturing, hot cracking, suboptimal. The presence of the twin plane makes growth in opposite directions in the twin plane dissimilar, not only in the zincblende lattice but generally. This mechanism explains most of the observed growth features in germanium dendrites, and is expected to apply generally to materials with the zincblende structure. The distribution coefficients of impurities are close to unity compared to quasi-equilibrium values.Ī mechanism for dendritic growth is proposed, in which the presence of at least one properly oriented twin plane is fundamental and necessary. ![]() Dendrites are crystals having a tree-like branched structure, with details. Dendritic morphology was more distinct at PEO/TA 70/30 composition, where the spherulitic growth rate showed a highly nonlinear relationship with respect to crystallization time (R t 1/2). The crystals grow rapidly in the 〈 211 〉 direction, have twin planes parallel to the flat surfaces, and can withstand an elastic strain exceeding 10 − 3. Dendritic crystals, which are the subject of this paper, are also very common. The cell crystallography preference in correlation to the intermolecular interaction in the dendrites in PEO/TA (70/30) blend was analyzed. Controlled dendritic growth of germanium from the melt yields long thin strips whose principal surfaces are optically flat crystallographic planes except for the occasional presence of small steps.
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