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Bonding and interfacial reaction between Ni foil and n-type PbTe thermoelectric materials for thermoelectric module applications

Xia, Haiyang and Drymiotis, Fivos and Chen, Cheng-Lung and Wu, Aiping and Snyder, G. Jeffrey (2014) Bonding and interfacial reaction between Ni foil and n-type PbTe thermoelectric materials for thermoelectric module applications. Journal of Materials Science, 49 (4). pp. 1716-1723. ISSN 0022-2461. doi:10.1007/s10853-013-7857-9.

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Integration of next generation thermoelectric materials in thermoelectric modules requires a novel or alternative approach for mating the brittle semiconducting thermoelectric materials and the ductile metal interconnects. In this study, pure Ni foil was directly bonded to PbTe-based thermoelectric materials using a rapid hot-press. The materials were sintered at 600 and 650 °C, under a pressure of 40 MPa and for various holding times. The resulting interfacial microstructures of the Ni/PbTe joints were investigated. Additionally, the distributions of elements and the phases formed at the Ni/PbTe interface were analyzed. The β_2 phase (Ni_(3±x) Te_2, 38.8–41 at.% Te) was identified at the Ni/PbTe joints bonded at both 600 and 650 °C. A ternary phase with approximate composition Ni_5Pb_2Te_3 was found at the Ni/PbTe joints bonded at 650 °C. Additionally, the PbTe(Ni) phase was observed along the Ni grain boundaries for both bonding temperatures. Thermodynamics calculation results indicate that only the β_2 phase can be formed at the Ni/PbTe interface at 900 K among the binary nickel tellurides.

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Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2013 Springer Science+Business Media New York. Received: 1 August 2013; Accepted: 31 October 2013; Published online 16 November 2013. Haiyang Xia would like to thank the Tsinghua Visiting Doctoral Students Foundation and the Opening Project of State Key Laboratory of Advanced Brazing Filler Metals & Technology (Zhengzhou Research Institute of Mechanical Engineering) for their support.
Funding AgencyGrant Number
Tsinghua Visiting Doctoral Students FoundationUNSPECIFIED
Zhengzhou Research Institute of Mechanical EngineeringUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20131204-085615020
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Official Citation:Xia, H., Drymiotis, F., Chen, CL. et al. J Mater Sci (2014) 49: 1716. doi:10.1007/s10853-013-7857-9
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42817
Deposited By: Tony Diaz
Deposited On:04 Dec 2013 19:33
Last Modified:10 Nov 2021 16:28

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