Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion
We used mathematical modeling to compare the stress and deformation in a Bi0.4Sb1.6Te3 solid solution base thermoelectric material for extrusion through different diameter dies. The results show that extrusion through a 20 mm diameter die produces a more inhomogeneous deformation compared with extru...
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
2017-12-01
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| Series: | Modern Electronic Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2452177917300828 |
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| author | Anatoly I. Prostomolotov Mikhail V. Mezhennyi Nataliya A. Verezub Mihail G. Lavrentev Vladimir B. Osvenskii |
| author_facet | Anatoly I. Prostomolotov Mikhail V. Mezhennyi Nataliya A. Verezub Mihail G. Lavrentev Vladimir B. Osvenskii |
| author_sort | Anatoly I. Prostomolotov |
| collection | DOAJ |
| description | We used mathematical modeling to compare the stress and deformation in a Bi0.4Sb1.6Te3 solid solution base thermoelectric material for extrusion through different diameter dies. The results show that extrusion through a 20 mm diameter die produces a more inhomogeneous deformation compared with extrusion through a 30 mm diameter die. Extrusion through a die of a larger diameter produces a structure that is coarser but has a more homogeneous grain size distribution. The degree of preferential grain orientation is higher for extrusion through a larger diameter die. We found a change in the lattice parameter of the solid solution along the extruded rod, correlating with detect formation during extrusion. The concentration of vacancies is higher for extrusion through a smaller diameter die. This difference between the structures results from a more intense dynamic recrystallization for a smaller diameter die. Increasing the die diameter and lowering the extrusion temperature allow retaining the thermoelectric properties of the material due to a better texture. |
| first_indexed | 2024-03-12T04:14:05Z |
| format | Article |
| id | doaj.art-8d32bd3567b44870b5956c664cbf257a |
| institution | Directory Open Access Journal |
| issn | 2452-1779 |
| language | English |
| last_indexed | 2024-03-12T04:14:05Z |
| publishDate | 2017-12-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | Modern Electronic Materials |
| spelling | doaj.art-8d32bd3567b44870b5956c664cbf257a2023-09-03T10:46:16ZengPensoft PublishersModern Electronic Materials2452-17792017-12-013414815310.1016/j.moem.2017.11.005Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusionAnatoly I. Prostomolotov0Mikhail V. Mezhennyi1Nataliya A. Verezub2Mihail G. Lavrentev3Vladimir B. Osvenskii4Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, 101-1 Prospekt Vernadskogo, Moscow 119526, RussiaJSC Optron, 53 Shcherbakovskaya Str., Moscow 105187, RussiaIshlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, 101-1 Prospekt Vernadskogo, Moscow 119526, RussiaJSC State Research and Design Institute of Rare Metal Industry «Giredmet», 5-1 B. Tolmachevsky Lane, Moscow 119017, RussiaJSC State Research and Design Institute of Rare Metal Industry «Giredmet», 5-1 B. Tolmachevsky Lane, Moscow 119017, RussiaWe used mathematical modeling to compare the stress and deformation in a Bi0.4Sb1.6Te3 solid solution base thermoelectric material for extrusion through different diameter dies. The results show that extrusion through a 20 mm diameter die produces a more inhomogeneous deformation compared with extrusion through a 30 mm diameter die. Extrusion through a die of a larger diameter produces a structure that is coarser but has a more homogeneous grain size distribution. The degree of preferential grain orientation is higher for extrusion through a larger diameter die. We found a change in the lattice parameter of the solid solution along the extruded rod, correlating with detect formation during extrusion. The concentration of vacancies is higher for extrusion through a smaller diameter die. This difference between the structures results from a more intense dynamic recrystallization for a smaller diameter die. Increasing the die diameter and lowering the extrusion temperature allow retaining the thermoelectric properties of the material due to a better texture.http://www.sciencedirect.com/science/article/pii/S2452177917300828Bi0,4Sb1,6Te3 solid solutionExtrusionTextureThermoelectric efficiency |
| spellingShingle | Anatoly I. Prostomolotov Mikhail V. Mezhennyi Nataliya A. Verezub Mihail G. Lavrentev Vladimir B. Osvenskii Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion Modern Electronic Materials Bi0,4Sb1,6Te3 solid solution Extrusion Texture Thermoelectric efficiency |
| title | Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion |
| title_full | Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion |
| title_fullStr | Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion |
| title_full_unstemmed | Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion |
| title_short | Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion |
| title_sort | influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion |
| topic | Bi0,4Sb1,6Te3 solid solution Extrusion Texture Thermoelectric efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S2452177917300828 |
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