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

De Gang Zhao; Li Wang; Yan Hong Cai; Wan Jiang; Li Dong Chen

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

Paper Titles

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Preparation and Research on TiO₂/SiO₂ Nanofilm with High Transmittance on Solar Cell Glass
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One-Step Sintering of CoSb₃ Thermoelectric Material and Cu-W Alloy by Spark Plasma Sintering
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Thermoelectric Properties of Bi_0.5Sb_1.5Te₃ Prepared by the Ultrarapid Quenching Process
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Thermoelectric Properties P-Type Si-20 at % Ge by Addition of TiN Nanoparticles
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Effect of B₂O₃ on Long-Last Phosphorescence of SrAl₂O₄:Eu²⁺,Dy³⁺
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Analysis and Design of High-Speed Flywheel on Satellite Energy Storage/Attitude Control System
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HomeMaterials Science ForumMaterials Science Forum Vols. 610-613One-Step Sintering of CoSb3 Thermoelectric...

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

Abstract:

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.