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MATHEMATICAL MODEL OF COMPOSITE MATERIALS FORMATION
Abstract
The aim of the present work is to develop, substantiate, and study a fundamentally new method of derivation of composite electrolytic films making it possible to control their composition and structure. We assume that, after the termination of the stirring-up of a bath containing the electrolyte-suspension with monodisperse spherical particles of the same density, a uniform sedimentation space is established. The upper boundary of this field will descend with a velocity depending on the dispersity and density of a powder, introduced into the electrolyte, and its viscosity. If one places, a horizontal cathode of area S in the bath at a certain depth simultaneously with the termination of stirring-up, all of the disperse phase situated in the electrolyte above the cathode will deposit on it. We substantiate the possibility of obtaining metal composite films with a prescribed composition by the method of cut-off of the sedimentation space over a horizontally located cathode. We present a calculation scheme and derive a formula which enables us to control the composition of the disperse phase in a composite electrolytic coating by the cut-off time. The results obtained open up new possibilities for forming the structure and, consequently, the properties of metal composite thin-film systems.
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