Kinetics, Stability, and Thermal Contact Resistance of Nickel–Ca3Co4O9 Interfaces Formed by Spark Plasma Sintering

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• 作者：T. C. Holgate (1)
  N. Wu (1)
  M. S?ndergaard (2)
  B. B. Iversen (2)
  N. V. Nong (1)
  N. Pryds (1)
  
• 关键词：Contact resistance ; thermoelectric ; metal–oxide interface ; calcium cobaltate ; spark plasma sintering
• 刊名：Journal of Electronic Materials
• 出版年：2013
• 出版时间：July 2013
• 年：2013
• 卷：42
• 期：7
• 页码：1661-1668
• 全文大小：591KB
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• 作者单位：T. C. Holgate (1)
  N. Wu (1)
  M. S?ndergaard (2)
  B. B. Iversen (2)
  N. V. Nong (1)
  N. Pryds (1)
  
  1. Department of Energy Conversion and Storage, Technical University of Denmark, Ris? Campus, Frederiksborgvej 399, Building 779, 4000, Roskilde, Denmark
  2. Centre for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, Aarhus C, 8000, Aarhus, Denmark
  
• ISSN：1543-186X

文摘

Incorporating oxide thermoelectric (TE) materials into TE power generation modules necessitates study of the interfaces between the oxide TE elements and the interconnect materials used to transfer current between them. In this study, interfaces between pure nickel and undoped calcium cobaltate (Ca3Co4O9) have been formed directly by spark plasma sintering (SPS). An intermediate NiO phase is formed during the SPS processes, which grows during post-heating with Co entering from the cobaltate side to form a graded Ni1?em class="a-plus-plus">x Co x O interfacial layer. The electrical and thermal transport across these interfaces, as well as the long-term chemical stability of the intermediate layers, have been studied and are discussed.