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

doi:10.1016/j.actamat.2019.11.010

IMR OpenIR

	Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity)
	Rogl, Gerda 1,2,3; Ghosh, Sanyukta 4; Wang, Lei 5,6; Bursik, Jiri 7; Grytsiv, Andriy 1,2,3; Kerber, Michael 8; Bauer, Ernst 2,3; Mallik, Ramesh Chandra 4; Chen, Xing-Qiu 5; Zehetbauer, Michael 8; Rogl, Peter 1,3
通讯作者	Rogl, Gerda(gerda.rogl@univie.ac.at)
	2020-01-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	183 页码:285-300
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.
关键词	Half Heusler Thermoelectric properties Severe plastic deformation High-pressure torsion TEM
资助者	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
DOI	10.1016/j.actamat.2019.11.010
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000506465100025
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：45[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/136617
专题	中国科学院金属研究所
通讯作者	Rogl, Gerda
作者单位	1.Univ Vienna, Inst Mat Chem, Wahringerstr 42, A-1090 Vienna, Austria 2.TU Wien, Inst Solid State Phys, Hauptstr 8-10, A-1040 Vienna, Austria 3.Christian Doppler Lab Thermoelect, Vienna, Austria 4.Indian Inst Sci, Dept Phys, Thermoelect Mat & Devices Lab, Bangalore 560012, Karnataka, India 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 6.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 7.Czech Acad Sci, Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic 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.