The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique

The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique

This study proposes a constrained hot compression-molding (CHCM) technique for preparing Bi<sub>2</sub>Te<sub>3</sub>-based alloys. This method overcomes the problem of easy cleavage and destruction for the zone-melted Bi<sub>2</sub>Te<sub>3</sub>-base...

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Main Authors: Dongsheng Qian, Ziyi Ye, Libo Pan, Zhijiang Zuo, Dongwang Yang, Yonggao Yan
Format: Article
Language:English
Published: MDPI AG 2021-06-01
Series:Metals
Subjects:
Bi<sub>2</sub>Te<sub>3</sub>-based alloys
hot compression
thermoelectric properties
mechanical properties
Online Access:https://www.mdpi.com/2075-4701/11/7/1060
id doaj-2707ef30874342b69a6e54251859e8ad
record_format Article
spelling doaj-2707ef30874342b69a6e54251859e8ad2021-07-23T13:54:06ZengMDPI AGMetals2075-47012021-06-01111060106010.3390/met11071060The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression TechniqueDongsheng Qian0Ziyi Ye1Libo Pan2Zhijiang Zuo3Dongwang Yang4Yonggao Yan5School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Intelligent Manufacturing, Jianghan University, Wuhan 430056, ChinaSchool of Intelligent Manufacturing, Jianghan University, Wuhan 430056, ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, ChinaThis study proposes a constrained hot compression-molding (CHCM) technique for preparing Bi<sub>2</sub>Te<sub>3</sub>-based alloys. This method overcomes the problem of easy cleavage and destruction for the zone-melted Bi<sub>2</sub>Te<sub>3</sub>-based alloy, which is beneficial to improve the material utilization rate and thermoelectric devices yield in the commercial manufacturing process. The stress field distribution inside the CHCM specimen is explored via finite element analysis. The compressive strength of the CHCM sample is above 44 MPa, which is about 38% higher than that of the zone melting (ZM) material. Meanwhile, the CHCM sample shows a much lower electrical conductivity and thermal conductivity, but a higher Seebeck coefficient than that of the ZM sample, which is mainly due to the increase of the line defect concentration induced by the CHCM process. Finally, a maximum thermoelectric figure of merit (<i>ZT</i>) value of 0.6 was achieved for CHCM sample.https://www.mdpi.com/2075-4701/11/7/1060Bi<sub>2</sub>Te<sub>3</sub>-based alloyshot compressionthermoelectric propertiesmechanical properties
collection DOAJ
language English
format Article
sources DOAJ
author Dongsheng Qian
Ziyi Ye
Libo Pan
Zhijiang Zuo
Dongwang Yang
Yonggao Yan
spellingShingle Dongsheng Qian
Ziyi Ye
Libo Pan
Zhijiang Zuo
Dongwang Yang
Yonggao Yan
The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique
Metals
Bi<sub>2</sub>Te<sub>3</sub>-based alloys
hot compression
thermoelectric properties
mechanical properties
author_facet Dongsheng Qian
Ziyi Ye
Libo Pan
Zhijiang Zuo
Dongwang Yang
Yonggao Yan
author_sort Dongsheng Qian
title The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique
title_short The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique
title_full The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique
title_fullStr The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique
title_full_unstemmed The Mechanical and Thermoelectric Properties of Bi<sub>2</sub>Te<sub>3</sub>-Based Alloy Prepared by Constrained Hot Compression Technique
title_sort mechanical and thermoelectric properties of bi<sub>2</sub>te<sub>3</sub>-based alloy prepared by constrained hot compression technique
publisher MDPI AG
series Metals
issn 2075-4701
publishDate 2021-06-01
description This study proposes a constrained hot compression-molding (CHCM) technique for preparing Bi<sub>2</sub>Te<sub>3</sub>-based alloys. This method overcomes the problem of easy cleavage and destruction for the zone-melted Bi<sub>2</sub>Te<sub>3</sub>-based alloy, which is beneficial to improve the material utilization rate and thermoelectric devices yield in the commercial manufacturing process. The stress field distribution inside the CHCM specimen is explored via finite element analysis. The compressive strength of the CHCM sample is above 44 MPa, which is about 38% higher than that of the zone melting (ZM) material. Meanwhile, the CHCM sample shows a much lower electrical conductivity and thermal conductivity, but a higher Seebeck coefficient than that of the ZM sample, which is mainly due to the increase of the line defect concentration induced by the CHCM process. Finally, a maximum thermoelectric figure of merit (<i>ZT</i>) value of 0.6 was achieved for CHCM sample.
topic Bi<sub>2</sub>Te<sub>3</sub>-based alloys
hot compression
thermoelectric properties
mechanical properties
url https://www.mdpi.com/2075-4701/11/7/1060
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AT libopan mechanicalandthermoelectricpropertiesofbisub2subtesub3subbasedalloypreparedbyconstrainedhotcompressiontechnique
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