One-Step Sintering of CoSb3 Thermoelectric Material and Cu-W Alloy by Spark Plasma Sintering
| Periodical | Materials Science Forum (Volumes 610 - 613) |
|---|---|
| Main Theme | Materials Research |
| Edited by | Zhongwei Gu, Yafang Han, Fusheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou |
| Pages | 389-393 |
| DOI | 10.4028/www.scientific.net/MSF.610-613.389 |
| Citation | De Gang Zhao et al., 2009, Materials Science Forum, 610-613, 389 |
| Online since | January, 2009 |
| Authors | De Gang Zhao, Li Wang, Yan Hong Cai, Wan Jiang, Li Dong Chen |
| Keywords | CoSb3, Cu-W Alloy Electrode, Spark Plasma Sintering (SPS), Thermoelectric Device |
| Price | US$ 28,- |
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.
