Durability of Silicide-Based Thermoelectric Modules at High Temperatures in Air

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• 作者：Ryoji Funahashi ; Yoko Matsumura ; Tristan Barbier…
• 关键词：Thermoelectric generation ; silicide ; durability ; module
• 刊名：Journal of Electronic Materials
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：44
• 期：8
• 页码：2946-2952
• 全文大小：1,033 KB
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• 作者单位：Ryoji Funahashi (1)
  Yoko Matsumura (1)
  Tristan Barbier (1)
  Tomonari Takeuchi (1)
  Ryosuke O. Suzuki (2)
  Shigeru Katsuyama (3)
  Atsushi Yamamoto (4)
  Hiroyuki Takazawa (4)
  Emmanuel Combe (1)
  
  1. Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology, Midorigaoka, Ikeda, Osaka, 563-8577, Japan
  2. Division of Material Science, Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
  3. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Yamadaoka, Suita, Osaka, 565-0871, Japan
  4. Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Umezono, Tsukuba, Ibaraki, 305-8568, Japan
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  Electronics, Microelectronics and Instrumentation
  Solid State Physics and Spectroscopy
  
• 出版者：Springer Boston
• ISSN：1543-186X

文摘

Thermoelectric modules consisting of n-type Mn2.7Cr0.3Si4Al2 and p-type MnSi1.75 legs have been fabricated by use of composite pastes of Ag with Pt or Pd. For the module prepared by Ni-B plating and with Ag paste, the specific power density reached 370?mW/cm2 at a heat-source temperature of 873?K. Ni-B plating 5?μm thick on the surfaces of the silicide legs reduced both the internal resistance and degradation of the power generated by silicide modules at temperatures up to 873?K in air. This is because of oxidation of Al diffusing into the n-type legs and reaching the Ag electrodes on both the hot and cold sides. Ni-B plating can suppress Al diffusion into n-type legs. However, cracking was observed parallel to the contact surface in the middle of the Ni-B plating layer on the p-type legs. It was also found that incorporating Pt or Pd into the Ag paste effectively suppressed degradation of the contact resistance between the silicide legs and the Ag electrodes.