Regularities of structure formation in 30 mm rods of thermo-electric material during hot extrusion

Lavrentev, M.G.; Bublik, V.T.; Milovich, F.O.; Panchenko, V.P.; Parkhomenko, Y.N.; Prostomolotov, A.I.; Tabachkova, N.Y.; Verezub, N.A.; Voronov, M.V.; Yarkov, I.Y.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.

Авторы: Lavrentev M.G., Bublik V.T., Milovich F.O., Panchenko V.P., Parkhomenko Y.N., Prostomolotov A.I., Tabachkova N.Yu, Verezub N.A., Voronov M.V., Yarkov I.Yu
Журнал: Materials
Том: 14
Номер: 22
Год издания: 2021
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Номер статьи: 7059
DOI: 10.3390/ma14227059
Аннотация: Ingots of (Bi, Sb)2Te3 thermoelectric material with p-type conductivity have been obtained by hot extrusion. The main regularities of hot extrusion of 30 mm rods have been analyzed with the aid of mathematical simulation on the basis of the joint use of elastic-plastic body approximations. The phase composition, texture and microstructure of the (Bi, Sb)2Te3 solid solutions have been studied using X-ray diffraction and scanning electron microscopy. The thermoelectric properties have been studied using the Harman method. We show that extrusion through a 30 mm diam. die produces homogeneous strain. The extruded specimens exhibit a fine-grained structure and a clear axial texture in which the cleavage planes are parallel to the extrusion axis. The quantity of defects in the grains of the (Bi, Sb)2Te3 thermoelectric material decreases with an increase in the extrusion rate. An increase in the extrusion temperature leads to a decrease in the Seebeck coefficient and an in-crease in the electrical conductivity. The specimens extruded at 450 C and a 0.5 mm/min extrusion rate have the highest thermoelectric figure of merit Z=3.2×10-3K-1.
Добавил в систему: Простомолотов Анатолий Иванович

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Regularities of structure formation in 30 mm rods of thermo-electric material during hot extrusionстатья Исследовательская статья

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