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On the morphological instability of growing crystals (I) morphological peculiarities of the transition shapes of crystals in diffusion‐controlled regime of growth
Author(s) -
Nanev Christo N.
Publication year - 1988
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.2170230502
Subject(s) - crystal (programming language) , diffusion , instability , materials science , crystal growth , face (sociological concept) , condensed matter physics , enhanced data rates for gsm evolution , optics , chemistry , crystallography , mechanics , thermodynamics , physics , telecommunications , social science , sociology , computer science , programming language
The shape and size of the gross morphological defect which occurs (in the form of a depression) as a result of the diffusion inhomogeneity in the matter supply on the growing crystal face with supercritical dimensions are investigated. The transition shapes of similar skeletal crystal faces are determined by considering the configuration of the steps which are moving (and accumulating) from the edge toward the centre of the crystal face. The basic parameter which is evaluated, is the width of the macroscopically flat periphery which grows around the depression and its alteration when the crystal is enlarged. The theoretical analysis is carried out by presuming that no transportation of crystallizing material occurs parallel to the crystal face. The calculations are based on the different thicknesses of the Nernst diffusion layer, a magnitude which can be easily determined experimentally by some interferometric technique, over the various regions of the growing face.