Lim, Sang-Soon Jung, Sung-Jin Kim, Byung Kyu Kim, Dong-Ik Lee, Byeong hyeon Won, Sung Ok Shin, Joonchul Park, Hyung-Ho Kim, Seong Keun Kim, Jin-Sang Baek, Seung-Hyub 2024-01-19T17:04:35Z 2024-01-19T17:04:35Z 2021-09-05 2020-07 0955-2219 https://pubs.kist.re.kr/handle/201004/118465 Hot extrusion is a promising method for producing high-performance thermoelectric bismuth telluride alloys because of its ability to create textured microstructures. However, hot extrusion is less favourable for scaling-up because of temperature and strain gradients along the radial direction, and only < 110 > -textured thermoelectric legs can be obtained because of the fibre-like texture. We suggest a way to overcome these disadvantages by implementing an additional spark plasma sintering process on a stack of extrudates. Using this combined process, we demonstrate the fabrication of 12 x 15 x 13 mm(3) p-type (Bi0.2Sb0.8)(2)Te-3 samples from extrudates that had originally been 3 mm in diameter. The evolution of sheet-like texture revealed by SEM, XRD, and EBSD allows us to obtain both < 110 > - and < 001 > -textured thermoelectric legs from a single specimen that are desirable for low- and high-temperature applications, respectively. Our results demonstrate the combined method as an industry-friendly process for fabricating high-performance thermoelectric materials. English ELSEVIER SCI LTD Combined hot extrusion and spark plasma sintering method for producing highly textured thermoelectric Bi2Te3 alloys Article 10.1016/j.jeurceramsoc.2020.03.008 1 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.40, no.8, pp.3042 - 3048 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 40 8 3042 3048 N scie scopus 000523629100036 2-s2.0-85081725723 Materials Science, Ceramics Materials Science Article TELLURIDE-BASED ALLOYS P-TYPE (BI,SB)(2)TE-3 SINGLE-CRYSTAL PERFORMANCE ENHANCEMENT Thermoelectrics Bi2Te3 alloys Hot extrusion (HE) Spark plasma sintering (SPS)