Enhancing Interfacial Properties of Mg2Si-Based Thermoelectric Joint with Mg2SiNi3 Compound as Electrodes

Shaoping Chen, Yanzuo Chen, Saneyuki Ohno, Libin Xu, Wenhao Fan, Lin Xue, Marhoun Ferhat, Yucheng Wu

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

The phase component and its evolution during aging at the joint between thermoelectric (TE) materials and electrodes are of much importance to the quality and the performance of the TE devices. While the figure of merit zT of TE materials determines the maximum efficiency of TE devices, undesired side reactions causing the growing interfacial resistance or mechanical failures between TEs and metal electrodes limit the actual performance of devices. Herein, the candidate electrode materials (Mg2Ni and Mg2SiNi3) for Mg2Si are explored, which is one of the cost-effective and environmentally friendly TE materials exhibiting high zT. The electrodes are directly bonded to Mg2Si by field-activated pressure-Assisted sintering (FAPAS) in one-step process. The interfaces of fabricated joints with different sintering times are monitored by electron microscopy, followed by the measurement of shear strength and the contact resistances. Outperforming strength (28.29 MPa) and contact resistance (63 μΩ cm2) are observed with Mg2SiNi3 at the joint bonded for 30 min. A long-term stability test on Mg2SiNi3/Mg2Si joint reveals a minute increase in the contact resistance as well as sufficient mechanical stability, suggesting that Mg2SiNi3 is a great candidate of the electrode materials for Mg2Si.

本文言語英語
論文番号1901035
ジャーナルPhysica Status Solidi (A) Applications and Materials Science
217
15
DOI
出版ステータス出版済み - 8月 1 2020
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 電子工学および電気工学
  • 材料化学

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