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Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity)

文献类型：期刊论文

作者Rogl, Gerda2,3,4; Ghosh, Sanyukta5; Wang, Lei6,7; Bursik, Jiri1; Grytsiv, Andriy2,3,4; Kerber, Michael8; Bauer, Ernst3,4; Mallik, Ramesh Chandra5; Chen, Xing-Qiu6; Zehetbauer, Michael8
刊名ACTA MATERIALIA
出版日期2020-01-15
卷号183页码:285-300
ISSN号1359-6454
关键词Half Heusler Thermoelectric properties Severe plastic deformation High-pressure torsion TEM
DOI10.1016/j.actamat.2019.11.010
通讯作者Rogl, Gerda(gerda.rogl@univie.ac.at)
英文摘要Several n- and p-type Half-Heusler (HH) thermoelectric materials (Ti0.5Zr0.5NiSn-based and NbFeSb-based) have been processed by high-pressure torsion (HPT) to improve their thermoelectric performance via a drastic reduction towards ultra-low thermal conductivity. This reduction occurs due to grain refinement and a high concentration of deformation-induced defects, i.e. vacancies and dislocations as inferred by this severe plastic deformation and documented via SEM and TEM investigations. In most cases the figure of merit, ZT, and the thermo-electric conversion efficiency were enhanced up to n similar to 10% for the thermally stable HPT-processed sample. Raman spectroscopy, backed by DFT calculations, proves that HPT induces a stiffening of the lattice and as a consequence, a blue-shift of the lattice vibrations occurs. Furthermore for all investigated specimens Vickers hardness values after HPT were significantly higher, whereas the change in the elastic moduli was less than 5% in comparison to the HP reference sample. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目Austrian OEAD[WTZ-CZ01/2019] ; Czech Science Foundation[17-12844S] ; Department of Science and Technology (DST), Govt. of India via the Indo-Austria Joint Project[INT/AUSTRIA/BMWF/P-06/2018] ; National Science Foundation for Distinguished Young Scholars[51725103] ; National Science Foundation of China[5167 1193] ; Science Challenging Project[TZ2016004]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000506465100025
资助机构Austrian OEAD ; Czech Science Foundation ; Department of Science and Technology (DST), Govt. of India via the Indo-Austria Joint Project ; National Science Foundation for Distinguished Young Scholars ; National Science Foundation of China ; Science Challenging Project
源URL[http://ir.imr.ac.cn/handle/321006/136616]  
专题金属研究所_中国科学院金属研究所
通讯作者Rogl, Gerda
作者单位1.Czech Acad Sci, Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic
2.Univ Vienna, Inst Mat Chem, Wahringerstr 42, A-1090 Vienna, Austria
3.TU Wien, Inst Solid State Phys, Hauptstr 8-10, A-1040 Vienna, Austria
4.Christian Doppler Lab Thermoelect, Vienna, Austria
5.Indian Inst Sci, Dept Phys, Thermoelect Mat & Devices Lab, Bangalore 560012, Karnataka, India
6.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
7.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
8.Univ Vienna, Phys Nanostruct Mat, Boltzmanngasse 5, A-1090 Vienna, Austria
推荐引用方式
GB/T 7714		 Rogl, Gerda,Ghosh, Sanyukta,Wang, Lei,et al. Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity)[J]. ACTA MATERIALIA,2020,183:285-300.
APA Rogl, Gerda.,Ghosh, Sanyukta.,Wang, Lei.,Bursik, Jiri.,Grytsiv, Andriy.,...&Rogl, Peter.(2020).Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity).ACTA MATERIALIA,183,285-300.
MLA Rogl, Gerda,et al."Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity)".ACTA MATERIALIA 183(2020):285-300.

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来源：金属研究所

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