کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7924411 1512276 2017 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of plastic formation parameters on structural characteristics of thermoelectric material during hot extrusion
ترجمه فارسی عنوان
تاثیر پارامترهای تشکیل پلاستیک بر ویژگی های ساختاری مواد ترموالکتریک در طی اکستروژن گرم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Modern Electronic Materials - Volume 3, Issue 4, December 2017, Pages 148-153
نویسندگان
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