Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects
Skutterudite-based (SKD-based) thermoelectric materials are well-known for their high figure-of-merit (zT value) in the intermediate temperature region. Based on the urgent need for long-term high-temperature service, the poor interfacial thermal stability when connected with the Cu electrodes has g...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Journal of Materiomics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847824000649 |
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| author | Hui Pan Zhan Sun Huiyuan Geng Qing Chang Bo Zhang Lixia Zhang |
| author_facet | Hui Pan Zhan Sun Huiyuan Geng Qing Chang Bo Zhang Lixia Zhang |
| author_sort | Hui Pan |
| collection | DOAJ |
| description | Skutterudite-based (SKD-based) thermoelectric materials are well-known for their high figure-of-merit (zT value) in the intermediate temperature region. Based on the urgent need for long-term high-temperature service, the poor interfacial thermal stability when connected with the Cu electrodes has greatly limited its industrial application. In this work, we propose a novel alloying route for the barrier layers for p-type SKDs. A Fe80Cr17.5Mo2.50/p-SKD junction with matched coefficients of thermal expansion (CTE), high mechanical reliability, and low contact resistivity is obtained. The addition of large-scale Mo causes severe lattice distortion in the barrier alloy, which contributes to the sluggish elemental diffusion. Thus, after aging at 823 K for 600 h, the Fe80Cr17.5Mo2.5 junction has a thinner reaction layer (∼25 μm), lower contact resistivity (∼3.8 μΩ·cm2), and higher shear strength (∼14 MPa), compared with the Mo-free (Fe80Cr20) barrier junction. Our finding opens a new insight for fabricating long-term high thermally stable SKD-based thermoelectric devices with desirable mechanical stability. |
| format | Article |
| id | doaj-art-7b4dd5bf5c4c4068b902d59078b9e7aa |
| institution | Kabale University |
| issn | 2352-8478 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj-art-7b4dd5bf5c4c4068b902d59078b9e7aa2025-01-14T04:12:25ZengElsevierJournal of Materiomics2352-84782025-03-01112100859Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effectsHui Pan0Zhan Sun1Huiyuan Geng2Qing Chang3Bo Zhang4Lixia Zhang5State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, ChinaCorresponding author.; State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, ChinaSkutterudite-based (SKD-based) thermoelectric materials are well-known for their high figure-of-merit (zT value) in the intermediate temperature region. Based on the urgent need for long-term high-temperature service, the poor interfacial thermal stability when connected with the Cu electrodes has greatly limited its industrial application. In this work, we propose a novel alloying route for the barrier layers for p-type SKDs. A Fe80Cr17.5Mo2.50/p-SKD junction with matched coefficients of thermal expansion (CTE), high mechanical reliability, and low contact resistivity is obtained. The addition of large-scale Mo causes severe lattice distortion in the barrier alloy, which contributes to the sluggish elemental diffusion. Thus, after aging at 823 K for 600 h, the Fe80Cr17.5Mo2.5 junction has a thinner reaction layer (∼25 μm), lower contact resistivity (∼3.8 μΩ·cm2), and higher shear strength (∼14 MPa), compared with the Mo-free (Fe80Cr20) barrier junction. Our finding opens a new insight for fabricating long-term high thermally stable SKD-based thermoelectric devices with desirable mechanical stability.http://www.sciencedirect.com/science/article/pii/S2352847824000649SkutteruditesLattice distortionBarrier layerDiffusionThermal stability |
| spellingShingle | Hui Pan Zhan Sun Huiyuan Geng Qing Chang Bo Zhang Lixia Zhang Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects Journal of Materiomics Skutterudites Lattice distortion Barrier layer Diffusion Thermal stability |
| title | Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects |
| title_full | Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects |
| title_fullStr | Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects |
| title_full_unstemmed | Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects |
| title_short | Thermal stability optimization of single-leg skutterudite-based thermoelectric devices based on lattice distortion effects |
| title_sort | thermal stability optimization of single leg skutterudite based thermoelectric devices based on lattice distortion effects |
| topic | Skutterudites Lattice distortion Barrier layer Diffusion Thermal stability |
| url | http://www.sciencedirect.com/science/article/pii/S2352847824000649 |
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