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Kinetic investigations within the transition region from polyhedral to skeletal growth mode (IV). Comparison between the kinetic critical size and the observed morphological size of the basal face of zinc single crystals
Author(s) -
Iwanov D.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170250404
Subject(s) - kinetic energy , diffusion , supersaturation , chemistry , zinc , argon , surface diffusion , crystallography , analytical chemistry (journal) , materials science , thermodynamics , physics , chromatography , adsorption , organic chemistry , quantum mechanics
The growth of zinc single crystals in a kinetic and a diffusion regime at argon pressures 5 – 250 Torr has been investigated. The growth of the edge of the basal face has been studied as a function of time at constant supersaturation and temperature of the furnace, simultaneously observing the surface of the {0001} face. It was established that in a kinetic growth mode the single crystals retained their polyhedral shape, whereas in a diffusion regime their form was changed into skeletal. A comparison was made between the critical size at which the transition from a kinetic to a diffusion regime began and the size at which a visible depression appeared on the {0001} face. In fact, the transition from a kinetic to a diffusion regime occurs simultaneously with the loss of the morphological stability of the basal face at kinetic critical sizes a k and R k .