One-Step Sintering of CoSb3 Thermoelectric Material and Cu-W Alloy by Spark Plasma Sintering

Abstract:

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In this study, we designed a suitable electrode material was designed, Cu-W alloy, which achieved a good thermal match with CoSb3 thermoelectric (TE) material. By means of spark plasma sintering (SPS), Cu-W alloy was introduced into CoSb3/Ti/Cu-W TE element successfully. Finite element analysis showed that the maximum thermal residual stress appeared at the cylindrical surface zone close to the CoSb3/electrode interface. SEM and EPMA results showed that an intermetallic compound (IMC) layer formed at the CoSb3/Ti interface and EDS analysis confirmed the IMC layer was TiSb phase. Shear tests showed that the shear strength of CoSb3/Ti/Cu70W30 joint was about 50Mpa. The potential profile of the interface area was measured by the four-probe method and the result showed no abrupt change in voltage was found around the interface. The high temperature reliability evaluation showed the joint had high thermal duration stability.

Info:

Periodical:

Materials Science Forum (Volumes 610-613)

Main Theme:

Edited by:

Zhong Wei Gu, Yafang Han, Fu Sheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou

Pages:

389-393

DOI:

10.4028/www.scientific.net/MSF.610-613.389

Citation:

D. G. Zhao et al., "One-Step Sintering of CoSb3 Thermoelectric Material and Cu-W Alloy by Spark Plasma Sintering", Materials Science Forum, Vols. 610-613, pp. 389-393, 2009

Online since:

January 2009

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Price:

$35.00

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