Domain structure analysis of (AgSbTe2)15(GeTe)85 thermoelectric compounds fabricated by rapid solidification process (RSP) and spark plasma sintering (SPS)

被引：6
作者：
Lee, Kap Ho [1 ]
Hong, Soon-Jik [2 ]
机构：
[1] Chungnam Natl Univ, Dept Nano Mat Engn, Taejon 305764, South Korea
[2] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 330717, Chungnam, South Korea
来源：
SCRIPTA MATERIALIA | 2017年 / 137卷
基金：
新加坡国家研究基金会;
关键词：
(AgSbTe2)(15)(GeTe)(85) thermoelectric compound; Domain structure; Twin boundary; Inversion domain boundary; Transmission electron microscopy (TEM); GETE; MICROSTRUCTURE;
D O I：
10.1016/j.scriptamat.2017.04.035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The domain structure of the thermoelectric compound (AgSbTe2)(15)(GeTe)(85) was analyzed using high resolution transmission electron microscopy. Numerous coherent domain boundaries of two different types were observed, formed by the polar phase transition from the cubic NaCI-type phase to a rhombohedral structure with an angular distortion of 0.5-1.5. One type has twin boundaries parallel to [001] and [110] directions, the other has inversion domain boundaries parallel to [111] and [112] directions. This high density of internal interfaces could reduce lattice thermal conductivity due to phonon scattering on the interfaces, and less deleterious on electronic transport processes, because they are coherent. (C) 2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：55 / 59
页数：5
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