THE ANALYSIS OF INFLUENCE OF TEMPERATURE DEPENDENCE OF PARAMETERS OF DIFFUSION ON THE NATURE OF GROWTH OF LAYERS IN A TWO-COMPONENT MULTIPHASE SYSTEM

Abstract

Рurpose. Subject of research – development of phenomenological mathematical model of formation and growth of phases regarding infl uence of temperature dependence of parameters of diffusion on the nature of growth of layers in a two-component multiphase system, topic– analysis of infl uence of temperature dependence of parameters of diffusion on change of nature of growth of layers in two-component multiphase systems. Methods and methodology. Chemical and thermal methods of processing. Novelty of article is the offer of new approach to a scientifi c explanation of different observed examples of deviations of growth of phases from Fick and Arrhenius’s laws and the proof that most of them is connected with lack of accounting of mutual infl uence on growth of multiphase layers of all phases of a diffusive zone. Results. It is proposed the solution of a problem of use of temperature condition of process of diffusion when developing technological processes of welding, soldering, application of coverings and others at which in a diffusive zone intermetallic layers, carbides, nitrides, suboxides, phosphides, etc. with the set and controlled operational characteristics of the received new materials, their connections, coverings and so forth are formed. Conclusions. Results of the solution of a task allow to control purposefully in the known parameters of temperature condition of process of diffusion received at a research of a two-component multiphase system dynamics of growth, structure of the layers which are formed in the course of diffusion, and their output parameters in this system for receiving new materials with the set properties.

Keywords

• temperature dependence of diffusion
• phase
• interphase border
• multiphase system
• mathematical model
• component.