Computer simulation of extrusion process of Bi2Te3 based tape thermoelectric materials
Keywords:
: simulation, extrusion, , tape thermoelectric materialAbstract
As long as in the process of hot extrusion of thermoelectric materials in the form of tape structures, billets of material are deformed under practically perfect plastic conditions, when optimizing equipment to obtain such materials, viscous fluid approximation may be used. This allows a computer simulation of the extrusion process using the hydrodynamic theory, where material is regarded as a fluid with a very high viscosity, which is a function of velocity and temperature. This paper presents the results of an object-oriented computer simulation of the process of hot extrusion of Bi2Te3 based thermoelectric material. Cases of producing thermoelectric materials in the form of tape structures for various matrix configurations are considered. The distributions of temperature and flow velocity of material in the matrix are obtained, as well as material velocity fields at the exit from the matrix which directly affect the structure of resulting material and its thermoelectric properties. Bibl. 6, Fig. 5, Тabl. 1.
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